broke radius and ulna in left arm with a splinter up my ulna 6". turn 1 in 2nd and some junior rider riding up in the senior class blasted into me and the handlebar caught my arm and snap! fell over got up and picked the bike up, pulled in the clutch to kick it over, ouch! dropped the bike and sat down on a bale. EMT says "looks like a nice sprain" as there is a huge bulge sticking down from the bottom of my arm about 2" up from my wrist. 10* bend put in full cast for 2 months comes out with 13* bend in my arm. finally grew out of the bump, but the bone is really close to the skin, so it kills to bump it. not bad though, i've had some real nasty biffs but usually only had a concussion.