I made a working xbow with an erector set. My cousin had to go to the ER to have a pencil jammed all the way up to the eraser pulled out of his, er, buttcheek. I wasn't allowed to play with the erector set stuff any more.

In my defense, he dared me to shoot him saying it wouldn't work because I was a nerdy stupidhead. When he was walking away, he called me a coward. What else could I do? I had to prove him wrong.