I would like to see them explore the myth of exploding gass can. It goes that some one put a plastic gass can in the bed of their truck. It had a plastic bed liner in it, and when he got it out he got schocked from the static electricity and it enigted.
I would like to see what happens to an astronaught if he punctures his suit in space and he can't get back to the shuttle/spacestation in time. Many people think he would explode, or his blood boil but I don't know it's realy cold in space, maybe he would just turn into a huge popcicle and float off into space. I don't know how they would test that though because if they put a body replica into a vacuum chamber they would also then need to freeze the inside and they would probably have to use liquid nitrogen to do that and then it wouldn't be a vacuum anymore :os