Riddle: You are in the middle of a blizzard with a light jacket and a heavy one. You are wearing the light one and carrying the heavy one. If you keep the light one on, you will freeze to death. If you take the light jacket off to put the heavy jacket on, you freeze in the time it takes to put the heavy one on. If you put the heavy jacket on over the light one, you will be too hot. How do you get the heavy jacket on without killing yourself?
Answer: Take a light sleeve off and put a heavy one on, then take the other light sleeve off and put the other heavy one on.