The bartender was dumbfounded when a gorilla came in and asked for a martini, but he couldn't think of any reason not to serve the beast. And he was even more amazed to find the gorilla coolly holding out a $10 bill when he returned with the drink. As he walked to the cash register, he decided to try something. He rang up the sale, headed back to the animal and handed it a dollar in change. The gorilla didn't say anything and just sat there sipping his martini.

Finally, the bartender couldn't take it anymore. "You know," he said, "we don't get many gorillas in here."

And the gorilla replied, "At nine bucks a drink, I'm not surprised."