A panda bear walks into a restaurant and asks to be seated. He orders a sandwich, eats it, and asks to see his bill. When the waiter returns with the check, the panda draws a gun, fires at the waiter, then makes his way towards the exit.
"Excuse me sir, what do you think you're doing?" the restaurant owner yells after the bear. "You've shot my waiter! Why?"
The panda produces a poorly punctuated wildlife manual and hands it to the man. "I'm a panda. Look it up," he says.
As the panda leaves, the man flips to the appropriate page and reads, "Panda. Large black and white mammal native to China. Eats, shoots and leaves."
BA DUM TSSSH. Let this be a lesson to you. The comma makes all the difference :)