An old farmer gets pulled over by a state trooper.
The officer lectures him on how irresponsible it is to be speeding, and does everything he can to get the farmer off-balance.
While the trooper is filling out a form, he keeps swatting at a swarm of flies around him.
The farmer says, “Having trouble with them circle flies, officer?”
The trooper replies, “Yeah – why do you call them circle flies?”
The farmer says, “Well, they’re usually seen circling round the back end of horses.”
“Ah, I see,” the trooper replies absentmindedly.
After a minute, the trooper looks up from his paperwork and says indignantly, “Wait a minute. Are you calling me a horse’s ass?”
The farmer says “Oh no officer, I’ve got too much respect for the police to do that.”
“Good,” the trooper says.
The farmer continued, “Hard to fool them circle flies though…”