I got one more story, but this one wasn't me, so it is kind of cheating.
It was snowing and all the kids in the neighborhood went to the big hill. One kid had a inner tube thing and slid down, aimed poorly, and slide directly into and under a parked car. They messed up their knee very badly and you could see the top of their knee-cap bone, as the skin and everything had ripped off. They were not crying, but they were seething in pain and were taken to the hospital. They were okay.