Once I said to a rough-looking guy at the bar, “Anything you can do I can do better.”

He jumped up and said, “Okay, top this!” And he punched me in the mouth and knocked out two teeth.

Slowly, I got up and brushed myself off.  Making a fist, I walked over to him to prove my point.  “Okay,” I said, “Now it’s my turn.”  Wham!  I punched myself in the mouth and knocked out three teeth.