I've seen sci-fi movies where the effects the body being unprotected in outer space are wildly different. In one movie, a guy radios for someone who's been ejected into space to breath all the air from his lungs immediately. In some movies, eyes are pulled from sockets. In others, ice crystals form, and the eyes begin to look a bit red... Sometimes the exposed person is a goner right away, sometimes they're shown to last for a minute or more. The Hollywood portrayals of space exposure just vary tremendously.
So I'm curious, what really happens to the human body in the vacuum of outer space?