It's a real eye opener to sit in a race car w/a 5 point harness. Once you're strapped in you're held against the seat & absolutely cannot move! You can tilt your head forward alittle but that's it. Modern seat belts are the the height of comfort compared to what it takes to keep a race car driver safe. I wear my seat belt all the time,not for what I might do but for what someone else might do!

Seatbelts saved the lives of me and my wife. We got rear ended by a speeding truck on a curve, with a steep drop on the outside. Car slammed into the barrier and crumpled, windshield was gone, and if we hadn't had our seatbelts on, we would have been thrown out that missing front window, over the edge, and we would have fallen to our deaths. Seatbelts saved us. Unfortunately the man who hit us was intoxicated, and had forgotten his. Still feel a bit queasy thinking about seeing that fella's body all tangled up in the now crushed rear end of my car. He wasn't dead yet, but he sure as hell wasn't alive either, if that makes any sense. It was horrifying, and we couldn't do anything for him, nor could the EMT's. Watched him stop breathing while passers by stopped to render aid. He had two kids apparently. Wear your dang seatbelts, folks.

I was born in 63 and began driving in 81, so I remember how uncomfortable seat belts were back in the 70s and how we hated wearing them - so we didn't - and our parents didn't care either. The belts also didn't retract, so they were ugly and a mess to organize, so when I got my first car (73 Nova) I actually removed them from the car, i actually unbolted them and threw them away. Of course now decades later it terrifies me to think that I actually did something so stupid! And of course all the people who drove in my car could care less if it had seat belts. Seat belt technology has come a long way since then, and so have attitudes about wearing them, and I'm very grateful for that!

Wm. Doizer was friends with the head of the NTSB. In 1966, Dozier was asked by him to help raise awareness of seatbelts and encourage people to use them. Dozier, producer of the Batman TV series on ABC, had the writers include Batman and Robin using their seatbelts. Usage increased due to kids pestering their parents to do as Batman did when starting the Batmobile.

Man Volvo is really kind for not patenting the seatbelt!

The advanced engineering that goes into normal everyday devices is remarkeable.

Not sure exactly how it works, but in many cars, if you fully extend the seatbelt, it'll go into "baby seat mode" when retracting, until fully retracted. In baby seat mode, no matter how slowly you pull, it won't come out at all, allowing you to firmly attach toddler seat and booster seats.

Seatbelt saved my life and my brothers in a rollover accident on a county highway. Unfortunately it didn't save my dad. I currently drive a Volvo and am so thankful for all the work they have done to create such a safety necessity

9:05 those car seats forced to watch their friend be tortured to learn the lesson chills my bones.

Malaysian here - First of all, I'm very sorry to hear the loss of your friend. Secondly, I couldn't agree with you more regarding my country's road safety record. I still remember sitting in my club president's car and I noticed that the rear seatbelts seem to have been removed from the car - l remembered how scared I was hoping that a crash wouldn't happen - or else I would risk launching myself into the driver's seat! Thankfully we are all safe and our drive went smoothly. It goes to show how shockingly lightly some people take road safety over here

Many years ago, when I was back at school, 4 guys from my year got into a car accident. The car tumbled several times and fell upside down. 3 of the guys easily climbed out of the car with minor injuries. The fourth died on the spot. The 3 were wearing their seatbelts. The fourth wasn't. Wear your seatbelts. They can save your life.

My uncle was once rear-ended hard enough that despite wearing a seatbelt, he ended up ejected from the car and into the pavement head-first. I may not know exactly how much worse his head injury would have been without a seatbelt eating up kinetic energy by being ripped to shreds while causing severe bruises, but those rips and those bruises were definitely the only reasons his health and car insurance gave him full coverage, keeping the bills paid while he was in the hospital and undergoing physical therapy. ALWAYS wear a seatbelt!

There’s some level of pride in some Swedish history textbooks about the three-point seatbelt that I’ve read.

i knew about most of how a seatbelt worked, but gotta say i never knew about the pretensioner! it’s remarkable how compact and reliable it all is

Seat belts are more important than most people realize. They once saved me from serious injury or death and I have seen many cases where people would have died without them. Some people argue that the seat belt can cause damage (internal bleeding and such). While this may be true in some cases, if enough force was generated that the seat belt caused internal bleeding, it would have been enough to kill the person for sure if they had not been wearing it at all. You will be much better off having all that force distributed across the area of the seat belt than having it concentrated on your chest by the steering wheel… or on your head from the windshield. Amazing video! I always enjoy them and learn something new every time. Keep up the good work!

It's amazing how far cars and their safety has come. Really something to appreciate and not take for granted.

25 year old here. I’ve been driving since I was 17, but more importantly I’ve been a passenger at times my whole life. In living memory I can’t remember a time where I didn’t instinctively put my seatbelt on when getting into a car. Be it as a kid, a driver or even as an immensely drunk passenger, it’s an instinctive and almost unconscious decision. My point being after that context bomb above; I don’t understand how there are people in the comments actively championing and bragging about how they don’t wear seatbelts. I understand that people may have experiences or have heard stories on how seatbelts have killed people or how not wearing one allowed someone to survive a crash. But the above is almost a statistical anomaly. That’s not even considering how people attribute survival through blind luck during a crash to the fact they were not wearing a seatbelt. Wearing a seatbelt is objectively better than not wearing one, whether it’s a legal requirement or not in your country, you’re far more likely to survive an accident when you are wearing one. That’s just a fact. So please everyone wear their seatbelts. When you get into a car, no matter your role in the vehicle or relationship to the driver….put your belt on. Stay safe everyone.

I likely wouldn’t be writing this if not for a seatbelt. Walked away from a bad accident. When I went to the scrapyard a few hours after to get my things from the car, the tow truck driver looked at me and said, “YOU’RE ALIVE?!” Haha.

As clever as seatbelts are, it's airbags that fascinate me. They have to fully inflate in such a quick time that it's literally unbelievable that they work at all. I had a friend who worked in a factory where they were designed and made, so I've got a pretty good idea of how they work. But, even so, I still find it incredible that they work so fast.

6:50 earlier tensioners were mechanical. A simple weight hit a blank cartridge, firing into the chamber with a piston inside.

I went off the edge of a road up in the mountains near where I live, went like 60 feet down an embankment in the woods. Rolled over a log but managed to walk out of it with only a few scratches, I was absolutely saved by my seatbelt holding me where I was and the cab of the car holding up when it rolled (RIP 1997 Nissan Maxima, amazing car)

The fact that the inventor released the patents free of charge is simply amazing

I’ll add my story to the plethora already here as a way to encourage seat belt useage. A few months ago, I was driving home from doing yardwork in my grandparents backyard all day. I was turning left at an intersection that I had the right of way for, when someone who was drunk and speeding ran the red light and T-boned my car right at the driver side door where I was. Last thing I remember from that is seeing pieces of metal flying around and then nothing. I guess I came to smelling smoke because I remember my first thought was, “holy shit is my car on fire? I need to get out of here.” What I eventually figured out that happened was that when the car hit me my body really started trying to move forward and my head hit a few things along the way. However the combination of my seatbelt and full airbag deployment protected my head enough so that I’m writing this today. I had to spend some time in the hospital recovering and I’m still doing physical therapy as part of the recovery process for the damage done to my C3 section of my spine, but when I got to see my car go to the wrecker, I really got a grasp for how lucky I am. Seatbelts and other safety measures in cars saved my life and save countless lives every year. It is incredibly sad that people still die because they won’t wear their seatbelt and they need to learn that the benefits outweighs the risks. Wear your seatbelt, it could save your life, after all you never know when something bad could happen.

I live in a SEA country that you might expect, still have a low public awareness on the importance of wearing safety belts. I'm thankful my parents are "unusually" strict with wearing a seatbelt whenever we get in a car ,and now it's just a reflex for me. These days a lot of cars have been fitted with seatbelt alarm that buzzes when it detects a seatbelt isn't being fitted while the seat is occupied, and so does cars in my workplace. It bothers me a lot when my colleagues fit the seat belt _before_ they sit and only sling on the diagonal torso bit, just to avoid the alarm from going off and pass the police check. It bit back when we had an accident. The driver swerved a c*** going on the wrong side of the road, then we hit a pole on the side of the road. Pretty much the biggest crash I've been on tbh. The front of the car sunk in, airbags went off, the driver and me (at the back) wore the seatbelt correctly, no serious injuries, the front passenger did the "half seatbelt" thing, slid off his seat and broke his legs. Happened 4 months ago and he still can't walk.

The seatbelt saved my life when I crashed at the Nordschleife at about 80km in the side railing. It did leave a big blue mark on my shoulder.

I distinctly remember, as a youngster in the 60's, when a local help-the-public agency held a seat belt fair at a local shopping center. Anyone could drive in and have belts (only lap belts at the time) installed in their car. This was in the Detroit area, where all the most important car-related things happened (in that era, anyway). My dad was one of the guys installing belts for all comers, for a few weekends one summer.

Seatbelts saved the lives of both my father and I and to this day I still consider them to be the most important innovation of automobile history. When I was 13 we were driving home from a baseball game that had gone far into extra innings at around 11 at night. As we were passing an off ramp, a car that was operated by a driver that we later learned was drunk flew out of the exit and into our lane and struck us at the rear, pointing us towards a heavily wooded forest. My father jerked the wheel towards the median, saving us from striking a tree but putting us on course to hit the median nearly head on. The impending collision led to my father slipping a disk in his back and myself to experience lifelong side effects from the severe whiplash, but we both walked out of that car alive and in relatively good condition.

What an excellent video. I grew up in the '70's and '80's - in the early part of my life, we had a Volvo station wagon and a '65 Dodge Dart. The latter had lap belts that were installed as an option. The former had one of the earlier versions of the 3-point harness. Even in the '70's the 3-point harness was considered somewhat novel. By the time we replaced the Dart with an early '80's Toyota Camry, the 3-point harness was pretty much standard, yet many people still refused to wear them. Like you, I remember when the tide began to change, in no small part due to enormous public service campaigns and enforcement of belt laws. Thankfully, I'm certain it saved the lives of some friends and loved ones along the way.

I've always worn a seatbelt no matter how short a car journey is. Never without it.

My dad is an anesthesiologist, he told me about one time he had to sedate a patient that had lost an eye because he wasn't wearing a seatbelt and he hit the airbag really really hard

As someone who's survived a 110kmh (66mph) head on crash with a big red Kangaroo that came in through the windscreen and then hit a granite rock wall while the Kangaroo thrashed around on my lap, the seat belt most certainly saved my life, it also did massive internal damage breaking 5 ribs and rupturing my diaphragm requiring an emergency Thoracotomy (open chest surgery). I've also had to have an additional 25 operations on my stomach. But had I not been wearing a seat belt I'd be little more than a red smudge on a rock wall with a dead Kangaroo for company. 🇦🇺

I grew up in with a family vibe that seat belts didn’t matter and they didn’t actually help. Until me and my father volunteered for the fire department. About 3 months in I realized, after seeing some horrible wrecks, seat belts do matter, and they do help. Now, I feel naked without having in on, just to move my truck in the driveway.

Two of my uncles died after getting thrown from a minivan. They were not wearing seatbelts. Three others in the car were wearing seatbelts and they survived.

Thanks for this video. I was born in the 80's myself and While I don't recall my seat belt usage as a child I know even than they were sometimes scoffed at. But since my teens and onward I automatically wear my seat belt and get annoyed when drivers don't give me time to put it on.

Being hit by a semi doing 50 on the highway while I was stopped I can say it's was mostly crumple zones and air bags that had me hobble away with minor injuries. However I do think the seat-belt helped and yea, every advantage you can have is a good one. I'm also one that went from 0% to 100% usage the day they became law.

The seatbelt fixates you with the only thing that can break at the speed you are going with it: The vehicle. WIthout it, the car would slow down without you, making you break for yourself (either inside or outside of the vehicle). Its like a parachute for ground level.

My mom told me that a common argument against wearing seatbelts (before it was legally required) was that they'd wrinkle your clothes. "Sure I might die, but my suit will be immaculate. "😅

Definitely the best ad for brilliant so far! Asking the right questions when you don't know what you don't know is such a fascinating problem

My grandma is from the generation that subscribed to the idea that seatbelts cause more damage. She recently got in a black ice related accident and now has a dent in her head from the dash. Still won't wear one lmao

I absolutely love engineering, and I'm an engineer myself. It was my passion for coding that led me into this field and I am forever grateful for it. Engineering plays a major role in so many different aspects of our lives today, from transportation to construction and healthcare. It gives us the tools to solve problems and make the world a better place. I'm proud to be part of the community that is constantly innovating and pushing the boundaries of technology to create incredible solutions. It truly is an amazing field to be in.

Love your videos dude. You’ve gotten really good at this, and I really appreciate learning just how crafty and creative some of these inventions are. Appreciate your hard work!

FYI, it's spelled 'braking', not 'breaking'. They both make the car stop, but one is voluntary, the other is not.

Torsion bars are not only designed to absorb some of the force, but also to break, if the forces get too high, so they don't stop the belt too much. I worked at a company manufacturing them and had to make them to different specifications for testing. Great video btw

My truck currently has only lap belts, but I'm planning on adding modern 3 point belts as part of the modification/upgrade plan. I've already ditched the solid spear steering column in favor of a collapsible one, too.

I am one of those whose life was saved by a seatbelt. I was in a rollover accident that most likely would have ejected me into traffic. I came out uninjured. I was skeptical about seatbelts before the accident. I was only wearing it because I didn't want a ticket.

It's fascinating how the technology has changed. Cars several decades old used pendulum or inertia electro/mechanical switches with the clock spring. I'd love to see your take on modern day SFI or FIA racing belts as well as HANS devices and the sled tests they use to develop them. It feels so unnatural to drive with the belt off. Open sourcing the original patent must have saved countless lives. Thank your for another awesome video.

I didn't know how interesting the engineering of seatbelts was so thank you for this comprehensive video! I always wear my seatbelt and when driving with passengers, I won't even start the car until all of them are buckled up. Seatbelts save lives!

Your videos look great and I also plan to watch them to improve my english because the quality of sound and your way of speaking are amazing. Thank you for videos like that ☺️

My first car was a 67 Buick Skylark back in 1998 when I was 15 (had a hardship license) that only had lap belts. I currently have a 70 Buick Skylark, it has lap belts and separate shoulder to waist belts that hang from the roof above the doors (car doesn't really have a B pillar), and has a little tension clip that you fold the belt buckle back and slide it into to hold it when not in use.

Seatbelts 100% have saved my life multiple times in the past!!! I rolled my car in the middle of a hurricane, ended up about 60m from where I had exited the highway. I literally walked back to the highway with a bump on my head and a small burn (business card sized) from the airbag.

SAAB & Volvo has Always been the Frontrunners when it comes to Person safety and Tech Development for cars in General. While Volvo was the first maker to introduce the 3 point safety belt SAAB was the first to have all seats belted with atleast a 2 point belt as standard. SAAB and Volvo probably has stood for more than 50% of all Important safety engineering of cars between 1950 to 2011

5 point harnesses are by far the safest and actually dont hurt if you have it adjusted properly. The bottom part of your body most likely will not slide due to the lower straps and really keeps you mounted overall. Nice harnesses with pads are hands down the safest thing to use

Love your content, thanks for this video, a very important topic ☺

The first car to break 100 km/h was an electric car in 1899: "La Jamais Contente (English: The Never Contented) was the first road vehicle to go over 100 kilometres per hour (62 mph). It was a Belgian electric vehicle". Wiki

This video was Amazing!! It was great to see how they really work! Great topic, Great message! 👍 I've always wondered what a 6 point harness feels like in a road car. Wear your seatbelts guys!

I grew up in the late 80s and 90s and definitely saw the way attitudes changed about seatbelts. I have some very nice memories of driving 5 days from my home in Ontario (Canada) to the Florida Keys with the family in my Dad's pick-up with a cap on the back. My brother and I rode in the back almost the whole time. There was a small window for us to crawl through to get up front, so we would crawl up there and all 4 of us crammed together on one row would go through the toll booths. We didn't want to get in trouble after all lol. As for the situation in the back, all we had was a mattress for us to sit on. Definitely no seatbelts. I loathe to think if we were rear ended by an 18 wheeler on the freeway. I don't remember much else from the journey. Nobody in my family wore seatbelts even in the front seat at the time, anyways. It wasn't until around 1992 when my Mum got pulled over for us not wearing our seatbelts that we started wearing them religiously. I was just little so I was absolutely terrified when we got pulled over. I thought my Mum (and possibly me) were going to jail. But he just gave her a warning and we wore our seatbelts religiously after that. Still do.

If you want to be a passenger in my car, wearing your seatbelt is one of the things I require. The other things are no smoking of anything, no drinking of alcohol, and no touching the stereo head unit.

On December 9th two girls flipped a blazer in front of my house and the 14 year old girl passenger got ejected and I tried to help but had to watch her die as I stayed with her and prayed,I'm still traumatized by it and will never forget what I seen,I'm a 37 year old man and cried at this scene,if she had just wore a seat belt all would have been ok,please wear your seat belt people cause it really will save your life and the hurt of many others.

We need more videos like this one!

I've learned the hard way why seat belts are important. Was in a Geo Storm in the passenger seat going across a cow pasture (I'm not exactly sure why we were doing this... I question it to this day). We hit a little drainage ditch and the car just stopped. I didn't until the windshield and my head and a real quick talk... I remember feeling the nose of the car dip. I started to say, "Oh no." but got cut off by the windshield saying hi. The impact was hard enough that I couldn't see for a few moments. I could feel my eyelids moving as I blinked but everything was black for that little bit. Vision came back fairly quickly, by the time I got out of the car I could see about like normal again. My ears immediately started ringing and it took about a day for that to stop completely. The windshield was definitely in worse condition than I was. The entire passenger half of it was basically turned to dust and the driver side was not much better. I walked away from that incident with just a few pieces of glass in my scalp and a headache. The hospital said I didn't even have a concussion. I was lucky, had one of many of the factors in that situation been different, I could have been ejected from the car through the windshield or had my head hit the A-pillar rather than the windshield - which would have been quite the doozy even for my hard ass head. Or you know, one factor different and I would have had a bruised collarbone and ribs - that factor being clipping on the seatbelt. Let's just say you'll be hard pressed to find me in a vehicle without a seatbelt. That happened when I was 12 (could have been 11 but fairly certain it was 12...). Let's just say you won't find me in a passenger vehicle without a seatbelt. I'll take my chances against the few times where seatbelts are detrimental, the benefits just outweigh the headache.

Y'know I would be shocked about the fact that there was "backlash" for seatbelts, something so simple and granted today that saved a documented million lives, were it not for the fact that we just observed something similar with the pandemic and vaccines....

I've been in 1 crash in particular that I fully believe my seatbelt saved my life. Always have and always will be a full supporter of seatbelts.

A really informative and eye opener video.

More modern saftey features being added are also adding another pretentioner to the attachment point on the other side of the belt opposite of the reel, to have more tension against the seats.

I always wanted to know why there were folds in my seatbelt held together by sewn threads. Now I know. Very interesting.

It's hard to fathom just how quickly making it a law to actually wear them has changed things. When I was young it was totally legal to drive around with your kids standing in the car and I remember several trips where a bunch of us were crowded into the back of someone's pickup truck and sloshed around haphazardly inside it on the way to a campsite...after it became law. In high school that had faded with almost everyone I knew wearing seatbelts and the few that didn't were rare enough that I assumed they just forgot. My first full-time job after college moved to an even smaller town and to my shock I was scoffed at by my boss and everyone else in the office for wearing my seatbelt in her car when we carpooled to lunch. By the time it was my turn to drive, they begrudgingly wore them because, as I pointed out, I'm the one who gets the ticket if they don't (none of them even bothered with the tinfoil hat things anti-seatbelters claim, they knew full well they were putting comfort over safety). I've since moved to an even smaller town (42k, 12k and 4k currently - at this rate I'll retire in my own town population 1) and everyone I know wears a seatbelt and even uses seatbelts as an example of something "obvious" as if none of them avoided seatbelts just 30 years ago. Seatbelts have saved my friends, and not wearing them has cost the lives of my father's friends. I really didn't want to see vaccines mandated when I was young because there have been some problems, but at this point we're going to have to put on our big society pants and mandate them like we mandated wearing seatbelts. Within a generation the idiots who think their tinfoil hats will protect them better than a vaccine will have died out. And I say that as one of the 0.0000000000000000000000000001% who had a reaction to the Pfizer vaccine. (I'm sick of being people's excuse.)

Excellent, well edited video!!

Thank you for spreading the word of Science, Knowledge and Engineering! All the best!

Just last week I was involved in a roll over accident. I can tell you first hand that my seatbelt kept my ass planted in that seat all the way through 👍🏽

*Ryanair enters the car manufacturering industry* Ryanair person:OK, so your car will cost £4,000, would you like a seat belt added? Person buying the car: Yes please Ryanair person: OK, that will be a seat belt fare, your car will now cost £8,000

I have been saved by a seatbelt from what would have quite a smash on the head (that I very likely would have survived but it would have hurt like hell) even though the car I was in wasn't even moving at the time. I got rear-ended when stopping at a pedestrian crossing.

Great explanatory vid. Thanks much.

I'm a mechanic. I gotta say, one of my favourite things ever is scaring the living hell out of new apprentices by setting off the charge in the seatbelt (if we change one and its intact, you can set them off just clamping them in a vice and using a car battery.) They don't do much like that, but they sound like a shotgun going off. Good times 🤣🤣🤣

I've been in two rollovers and had zero injury because I was wearing my seatbelt. I had a friend that died because she wasn't wearing one and her vehicle rolled at highway speed and she was ejected and killed. It's the dumbest thing to not buckle up!

I actually prefer using my seatbelt when driving or when being a passenger. Not just out of habit or because of the annoying alarms cars have. It’s simply more comfortable to wear a seatbelt, it stops your body from moving excessively around the seat. I think of seatbelts as the belt around some loose pants. You use a belt to keep them from falling. Having to constantly adjust your pants is such a pain, just as not wearing a seatbelt means your body is too loose on the seat. That plus the obvious safety benefits is simply a no brainer to use a seatbelt all the time

i never knew seatbelts were so complicated! thank you for explaining how they work and how they can save lives! Just know, you, yes you, the creator, you are saving lives by spreading information! 👍

As someone from Malaysia, can confirm that road safety leaves quite a bit to be desired, especially with the popularity of motorcycles in the country. If I remember correctly, rear seatbelts were only legally required to be worn in the late 2000s or early 2010s

"Speed doesn't kill. Speed has never killed anyone. Suddenly stopping, that's what gets you" Jeremy Clarkson

I'm very glad our dad always required me and my sister and everyone else that got in our car to wear their seatbelts, it ingrained and made us accustomed to the habit of always having it on. I won't lie and say I don't find it uncomfortable at all, but that has never stopped me from wearing it while I'm inside a car.

We're also seeing more and more GA aircraft now with airbags as an integral component of the seat belt itself.

I already know exactly how seatbelts work. But your videos are so good and put together well, that it actually makes it so much better.

It's really wild, I'm not even 30 yet, but I grew up riding around town in the bed of my grandparents pickup truck, let alone being in a seat with a belt. They change I've seen towards seatbelts over the past 10-20 years is honestly kinda incredible looking back. So many people who said they would never do it hardly think about it anymore as they buckle up. Definitely a good change, super thankful seatbelts exist!

When seatbelts came out, I wasn't a fan; therefore I didn't use them. Several years later at a county fair, the state police had a trailer they called "The Convincer". It was a car seat (with seat belts) on a small ramp that slid down to a sudden stop. My Mom insisted I ride it while she watched my toddler children. I went over and the officers showed me the proper way to wear the seat belts, and hoisted the seat up the ramp. Then they simply released the mechanism and I slid down. It really wasn't going very fast so I wasn't expecting much. That sudden stop and the amount of force I experienced did as intended; it CONVINCED me! That was decades ago and I ALWAYS wear my seatbelt, even if I'm just moving the car in the driveway!

I had to send this to my family because they refuse to. Can you also do a video on the f-22 raptor? Ever since I kid I was i love with it and your videos are amazing and would love to hear you talk about it.

The rule in my car is that we don't go anywhere until everyone is buckled up. I'm always surprised at how many of my friends fight me on this.

I grew up in the 80s and I grew up driving around, standing up in the backseat. We didn't wear seat belts in our family until it became law. Its amazing how many people really fought hard against wearing seatbelts when legislation was introduced. I remember hearing people talk about how it was better to be thrown clear of the accident and make other insane claims about how seatbelts made accidents more dangerous.

Informative video as always

Yep i agree on malaysian is so hard to wear the seatbelt. We even had extra item to bypass the alarm triggered by not locking the seatbelt.

Seatbelt is a masterpiece of engineering and it can stop a dangerous accident from happening! But sadly most of the people are not wearing a seatbelt while driving!

I have a burn scar from the pretentioner triggering during a crash, but i prefewr having the scar to being dead.

I was hypothesizing about how this mechanism works a couple of weeks ago while riding in a ridershare car with my partner. I'm not surprised it was recommended by the algorithm, but I am surprised that it was uploaded after I was wondering about it 🤔🤯🤣 awesome video! I didn't know about the other parts, but the centrifugal ratchet paul (sp?) I got right. I didn't fully figure out the catch that stops due to braking though. I did figure it had something to do with a pendulum.

5:26 was really brilliant! Damn, I love Engineering! :D

I went out to my car and tried to count how many pyrotechnic charges, airbags/seatbelt pre-tensioners, I'm surrounded by while driving. I gave up after about a dozen, too many and too hard to identify each one. They're everywhere. I found SRS-Control boxes bolted to the underside of seats because the seats have airbags. Found some money too. (2014 Volvo) Can't even drive without buckling up due to the beeping eventually reaching a volume similar to that of a smoke alarm.

I put on my seat belt without even thinking about it it’s just muscle memory when I get in a car.

God bless you Real Engineering crew. What a blessing you are.

As a machine designer, I often forget how much ingenuous design is around me at all times

Seat belts also help you keep control of the vehicle. If you take a corner too quickly or are struck from the side, they keep you behind the wheel so you can steer.

The seatbelt is the number one public safety device because the car is the number one public safety threat

the seatbelts in my car work with a steal ball that when not in the 0 position looks the mechanism.. i had once dust in there and it was the whole time blocked... that way i learnd how it works :D

I'm not sure about other manufacturers, but my Lexus has electric pretensioners in addition to the pyrotechnic pretensioners. The obvious advantage of the electric portion is that it is not a one time use device. When a pre-collision event is detected (hard braking, radar detection, maybe some others as well) the electric pretensioners will activate, and they actually apply a surprising amount of force! It surprised and startled me the first time they activated! I imagine that part of the benefit of them is that they cause occupants to begin bracing slightly before an impact.