1. About 8-10 years old biking with my younger sister and mother while we were on vaccation. Being the big boy, I was out ahead and looking back and rode smack into the back of a moped that was parked on the side of the road. Stupid.

2. About 13-14 years old, was riding home from a store with the shopping bag hanging off my left handlebar. As I was going down a hill I wondered what would happen if I brushed the bag against my quickly rotating spokes. I guess I figured it would make a "zzziiipp" sound and bounce away. Of course, what happened was the bag got caught in the spokes, made the trip around the hub, stuck in the fork, stopping my wheel and bike, I endo and really hurt my shoulder and elbow. Had to wear a sling for 2 weeks. Sooooo stupid.