A policeman in Ontario pulls over a Newfie for speeding. While he’s writing out the ticket a fly’s bothering the Cop.

The Newfie says. “That’s a circle fly, sir.”

The policeman asks, “What’s a circle fly?”

The Newfie says, “Them are the flies you find in the barn around a horse’s ass.”

The policeman says, “Are you calling me a horse’s ass?”

“Oh no sir”, says the Newfie, “I would never say a thing like that: but you can't fool them flies, sir.”