A man's car breaks down right in front of a farm and he's trying to fix it when he hears a voice coming behind him, "You have water in the gas tank." The man turns around and all he sees is a cow from the farm.
He goes back to his car and again the same voice says, "You have water in the gas tank." The man turns around again and he sees the cow but this time the voice came again but it's from the cow, "You have water in the gas tank."
The man is shocked so he knocks on the door of the farmer's house. When the farmer answers the door the man says, "The cow talked to me and said I had water in my gas tank. He can talk?" The farmer replied, "Ignore him, the cow doesn't know a thing about cars."