The Prison Escape

A brunette, a redhead, and a blonde are trying to escape from a prison. The guards are onto them, so they all hide in sacks.

The guards see the sacks moving and send a soldier to poke each one with his gun. The soldier pokes the first sack, and the brunette says, "Woof!" The soldier says, "Oh, it's just a dog." He pokes the second sack, and the redhead says, "Meow!" The soldier says, "It's just a cat." He pokes the third sack, and the blonde says, "Potatoes!"