i have had many bails and inuries but my worst one would have to be when i did this:
http://www.pinkbike.com/modules/photo/?op=viewℑ=445663
i was turning around on a wall and gapping as far as i could to the ground, i then slipped off of my pedal and 'smash' the pedal hit my shin/knee full pelt, taking a chunk of skin out. I went to hospital to have 7 stitches put in. I was in shock more than i was in pain, just the look of having a big hole in my leg lol.
The worst falls ive had are on all the little stuff some how . :(