Thank you Franco Rios for this one

A cocky US Department of Agriculture inspector drove up in
a fancy white truck and told the farmer "I need to inspect
your farm."

The farmer reluctantly but confidently said, "OK, but don't
go in that field right over yonder."

The inspector said, "Mister, I have the authority of the
United States Government with me. See this card? This card
means I am allowed to go wherever I wish on any agricultural
land. No questions asked, and no questions answered. Have I
made myself clear?" The farmer nodded politely and went about
his chores.

Some half an hour later, the farmer heard loud screams for
help and looked up to see the inspector running for the fence
pursued by his prize bull, which was gaining with every step.

The farmer immediately put down his feed buckets, ran to the
fence and shouted out, "Your card! Your card! Show him your card!"