Hi everybody I am going to tell you a short story , do you think it needs any puntuation in it?

A panda walks into the library. He eats a sandwich, then shoots two arrows. "Why did you do that?" asks the librarian as the panda walks toward the exit. The panda shows her a badly punctuated book. "I'm a panda, " he says. "that's what it says we do."the librarian looks at the page: PANDA large black -and -white bear-like mammal, native to china. eats,shoots and leaves.
WHY, COMMAS REALLY DO MAKE A DIFFERENCE!!!