Took care of a unlicensed 16 year old who decided to take Dad's car for a midnight joyride and ended up ejected from the vehicle after crashing head-on with a telephone pole. Heavy front end damage to the vehicle, which quickly caught fire. Positive loss of consciousness for the kid, who thankfully did not. Remarkably he ended up with few serious injuries after a mechanism that could have easily killed him.
I have a younger cousin who is learning to drive this summer, and it's stories like these that scare the crap out of me.