A class of 3rd graders return from their field trip to the farm and the teacher asks them, “what kind of noises did you hear at the farm?”

The first kid raises his hand and says,

“I heard the cow go moo!”

The second kid raises his hand and says,

“I heard the pig go oink!”

Little Johnny raises his hand and says,

“I heard the farmer yell ‘get off my tractor you little bastard!”