I was standing at the bar of Terminal 3 in the Atlanta International Airport when this small Chinese guy comes in, stands next to me, and starts drinking a beer.
I asked him, "Do you know any of those martial arts things, like Kung-Fu, Karate, or Ju-Jitsu?"
He says "No, I don't. And furthermore, why would you ask me that? Is it because I'm Chinese?
"No", I said, "It's because you're drinking my beer, you little prick."
(thanks to Dale McElroy)