On the Necessity of Punctuation

A panda walked into a cafe. He ordered a sandwich, ate it, then pulled out a gun and shot the waiter. 'Why?' groaned the injured man. The panda tossed him a badly punctuated wildlife manual. The waiter found an explanation. 'Panda,' ran the entry for his assailant. 'Large black and white mammal native to China. Eats, shoots and leaves.