I have broke a fair few bones
Most of these from when I used to race Moto-x bikes.
collarbone, ribs, left wrist twice (once complete carpal dislocation which required wiring) I have permanent pins in my left index finger also I have broke left hand, left thumb, right wrist twice. I always had a habit of putting my hands out in front of me when getting chucked off the bike which gave me a lot of wrist/hand injuries.
if you brake both your wrists at the same time I gaurentee you will be amazed how much you take things like the ability to wipe your own ass fro granted.
Most serious accident was a ruptured spleen - Moto-x agian - badly mistimed a double jump and hit the face of the second jump - its a really unpleasant thing to have - at one point I thought i was going to have all of my birthdays at once.