Shorthorsemom, that's really interesting. I know there have been a LOT of myths about that part of the movie. I've heard all kinds of stories, the biggest one being that the horse died during the fall. I know that one stuntman and a horse did die during filming, but neither were the main stars of the movie (Denny/Jim). The real Denny died in 1999. Sam, which was Denny's stunt double for the ride down the hill in the second movie, was still very much alive in 2008 at the age of 34. I've never heard that Tom Burlinson had broke his leg by doing his own stunts though.