Last week I ran a lap around some houses with my friend, while drunk. I was actually winning until, just before the finish, I hit the pavement. It was funny at the time though.
Stupidest thing, though, is when I was eight or something. We just got back from doing the groceries and first dropped of my grandma. I stayed in the car and my mom was talking to my grandma. I picked up a little stick, stuck it in the ignition and said something along the lines of "vroom vroom".
About 100 dollars and a week later the car was working again

.