Funny Joke

In the mall there were 3 robbers who was being chased by a police. The three robbers found a 3 sacks ,now each of them have a sack, they hid inside the sack and then later the police walks by and saw the 3 sacks,the police kicked the first sack
the guy in the 1st sack said "woff,woff" the police said Oh! its only a dog,then he kicked the 2nd bag and the 2nd guy said "meow,meow" then the police said Oh! its only a cat,and then finaly the police kicked the 3rd sack and nothing happens he kicked it again and still nothing happens he kicked it for the last time and finally the 3rd guy in the sack said "Fuck You" I'm a potato i'm not suppose to speak.....