Starts playing when the player enters the chamber. It continues to play until the player exits the area.
In this corrosive chamber, lies a Headcrab Zombie that can somehow speak like a human. The "ambience" is rather a four-second loop, so it was extended. Nothing else to be said, really... -_-
"If you're bent on reaching the surface, then you'll want to-" - Headcrab Zombie Scientist, before mutating