A Panda

A panda walks into a restaurant, sits down and orders a sandwich. He
eats the sandwich, pulls out a gun and shoots the waiter dead. As the
panda stands up to go, the manager shouts,

"Hey! Where are you going? You just shot my waiter and you didn't pay
for your sandwich!"

The panda yells back at the manager, 

"Hey man, I'm a PANDA! Look it up!"

The manager opens his dictionary and sees the following definition for

"A tree dwelling placental mammal of Asian origin, characterized by
distinct black and white coloring. Eats shoots and leaves."