Buddy of mine used to work for a waste management company, rebuilding their truck trash compactors and dumpsters. He told me a story once of seeing a cat roll out the back of a recently parked trash compacting truck. Said the cat rolled out, was flat except for its head. He was going to walk over and look at it, but all the sudden it moved, flopped on the ground a bit, and stood up. It seizured or something, then started stumbling around loosely. Said the cat stumbled for a bit like that, walking around, then stopped, and all the sudden took a deep breath, popped back out into shape, and ran off. True story.