Motorcycle wreck. The bone in my arm was sticking out my shoulder.
I also had broken bone in my wrist for "9 to 12 months" (skateboarding) before I went to the Dr about it. Cast, for 6 months, followed.
Another good question, is what is DUMBEST injury you have ever had? My two best:
(1) Broke my thumb doing a method: went to grab the board with my hand, and just ended up kicking my thumb with the snowboard, really, really hard. Smooth.
(2) Skateboarding in downtown Boston with some friends. We were trying to bomb this hill, ollie up a curb, and then manual an entire city (sidewalk) block. None of us could do it. We kept running out speed about 15' short off the curb on the far side. Then, I decided to grab onto a bus for extra speed. It worked. I just *barley* made it across the whole thing. I got off my board, and started walking back over for high-fives from friends. Then, I tripped on the very same curb I had just manualed off the end of, fell, and chipped my tooth. Super smooth. Skateboarding isn't dangerous. Walking, however...