> Who can forget that rat breathing liquid oxygen (or whatever they called it)

I remember seeing the movie as a child with my parents and I was quite appaled by that scene (I hate seeing animal abuse). My father ensured me that was just some kind of effect trickery (I think he believed so himself). Later I found out that it was indeed real.

The liquid is called fluorocarbon.

https://en.wikipedia.org/wiki/Liquid_breathing#Films_and_tel...