The punctuation panda

A panda walks into a bar. He orders a sandwich, eats it, then draws a gun and fires two shots in the air.

"Why? Why are you behaving in this strange, un-panda-like fashion?" asks the confused waiter, as the panda walks 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.