Taking charge

A police officer stopped at a farm and told the farmer, "I need to inspect your farm for illegally grown drugs."
The farmer said, "OK. As long as you don't go in that field over there."
The policeman sneered nastily. "I think you'll find, sir, that I have the authority of the police force behind me." He pulled out his badge. "See this? It means I'm allowed to go whereever I want. No questions asked, no answers given. I'm in charge. Understand?"
The farmer nodded politely and went about his chores. A short time latere, he heard loud screams. He looked up to see the policeman running for his life, pursued by the farmer's massive bull. With every step, the beast was gaining ground. The policeman looked terrified.
The farmer threw down his tools, ran to the fence and shouted at the top of his lungs, "Your badge - show him your badge!"