I've edited the poll due to one of the options veering a bit too close to something that should be kept private. None of the replies here so far have been too bad, but please remember: certain things that might not faze some people might bother others who view the thread.
Anyways, to stay on-topic: I've never broken anything, but I have injured various appendages to the point where I honestly wondered if they were broken. As a kid, I sprained the index finger on my left hand after landing on it awkwardly when jumping into a swimming pool (it was one of those small, cheap, plastic pools that can easily be bought at a store). It might not have been broken, but it was still kept in a splint for a little while. As well, I majorly bruised the big toe on my right foot a few years ago, after accidently banging it hard into a piece of wood. >_o It was only because of an x-ray that I found out for certain that it wasn't broken.