alot of bike accidents (sp) well ill add mine ( i have a few but there to long). me and a couple friends were racing down his gravel drive and at the end was a couple holes. i was hauling ass and my chain popped of sending me foward. i hit one of the holes and it acted like a little wall. i shot across my handle bars and i smacked my head into the ground so hard i blacked out. luckly i had on my helmet. i had road rash below my eye to about my upper lip and messed up hands and elbows.