Funny story I got, one day I noticed my Predator 2's legs were all... bowed looking, kinda like a kid that has to pee in a cartoon.
The case I have my Preds in, is a huge plexiglass box with a trap door on top, and to make look a little better, I keep some shiny black material in the bottom of the case, and on the top.
Well, I decided I'd open it, and fix his legs (which it turns out, in my excitement on getting my first, I accidentally put the wrong lower legs on him), I opened that trap door and WOOOOOOOOOOOF! out came the BIGGEST stink of rubber and plastic...as awful as it smelled, it was almost euphoric, well... if you're into plastic and rubber.