From the Darwin Awards

"Seems this guy from Arkansas wanted some beer pretty badly. He decided that he'd just throw a cinder block
through a liquor store window, grab some booze, and run. So he lifted the cinder block and heaved it over his head at the window. The cinder block bounced back and hit the would-be thief on the head, knocking him
unconscious. Seems the liquor store window was made of Plexiglas, and bulletproof. The whole event was caught on videotape. "

I'd love to see the videotape. Does anybody know a site out there that has it?

You've tried and failed. The lesson here is, never try again. -- Homer Simpson.