My memories of this film are very vague, so I’m sorry for this. However I remember a family driving along on a very stormy night. The rain is lashing down on the windscreen giving very poor visibility. Suddenly out of the gloom looms a person in a yellow coat and hat (think sou’wester). The car runs off the road.
One of the people from the car (possibly driver, but I can’t really remember) wakes up in hospital. He is horrified to discover he has had a limb amputated (can’t remember whether leg or arm, but I *think* it was the arm). They sedate him when he becomes distressed. From here on he wakes several times, each time he has had further surgery or amputations, and each time he needs to be sedated.
Can’t really remember anything more apart from being very disturbed when I was a kid.