Honda Big Red 3 wheeler. Me and a couple buddies were 1 upping each other on climbing a dirt mound the county had hauled to one of our riding areas. I made it to the top but instead of going on over I rolled back down and hit the brakes about the time I got close to the bottom. It came down on top of me and pinned me to the ground. The metal frame around the head light gashed my forehead, broke out several of my teeth, and broke my jaw. 160+ stitches in my head and tomato soup through a straw for 6 weeks wasn't much fun for a 15 year old.