A mouse is in the kitchen with her baby when a cat strolls in.
The mother mouse picks up the baby mouse and runs as fast as she can, but she's not fast enough. The cat pounces, so she spins around and shouts at the top of her little voice, "Woof! Woof!" The cat is so shocked it stops in its tracks, and runs away.
The mother mouse turns to her baby and says, "You see now how important it is to learn a foreign language?"