"Why?" asks the confused waiter, as the panda makes towards the exit.
The panda produces a badly punctuated wildlife manual and tosses it over his shoulder."I'm a panda," he says, at the door. "Look it up."
The waiter turns to the relevant entry and, sure enough, finds an explanation. "Panda. Large black-and-white bear like mammal, native to China. Eats, shoots and leaves."
So punctuation really does matter, even if it is only occasionally a matter of life and death!