A Joke

Three thieves were stealing from a shop and the cops ran after them. They hit themselves in 3 different bags. A cop started to pork each bag one by one. The first bag had the sound "woof woof". "leave it, it is just a dog." He poked the second bag. "Mew" "Leave it, it is just a cat". He again poked the third one. "Potato". The cops arrested the man in the third bag.