When I was 10 my brother bought a new 1964 Honda 50. One day he let me ride it in the high school parking lot. I rode around the lot and then decided to whip in by the tennis courts. I didn't see the chain stretched across the driveway. The chain hit the bike just below the headlight. Fortunately it was only attached with wire at one end and it broke loose. I can't remember if I crashed or not. I wasn't hurt and only a little damage was done to the bike. I'm sure it was a long while before he let me ride it again.