A panda walks into a bar, orders and eats a sandwich, fires a gun into the air, and then walks out. On his way out, he tosses a poorly punctuated wildlife guide to the bemused bartender. The bartender turns to the entry for panda, and reads Panda: Native of China, this creature eats, shoots and leaves.

I was reminded of this joke while reading an article in the NY Times yesterday on a surprising best-seller on punctuation (entitled Eats, Shoots and Leaves). I only realized later that the joke is not only an attack on poor punctuation -- it's an ad homonym attack as well.