Wow, I must be one of the few people who hasn't done anything bad to a car! Never been in an accident that was myfault, all involved someone hitting my parked car. I've had is speeding tickets, but got supervision on all of those so they aren't even on my record. Lucky me.

Worst thing I can think of is when I did a 6 grand neutral drop in my old Escort wagon and destroy it, this was just before I dropped it off at the dealership. Car still drove, but slipped very badly. We still got our $100 trade in value.