I don't know if this has been told yet,

Three blondes decide to rob a bank. They get in, grab the money and run away. Some security guards start chasing them and they hide in the nearest shop . in the shop there are three bags. One full of dogs, one full of cats and one full of potatoes.
They hide in one each. The guard walks in and sees the containers.
He pokes the first one and the blonde says "Bark, bark, bark".
Then he pokes the second one and the blonde says "Meow, Meow, Meow". He pokes the last one and the blonde says"Potatoe, Potatoe, Potatoe"