Sarah Palin is touring rural America in a chauffeur-driven Lexus. Suddenly a cow jumps out into the road, they hit it and the car comes to a stop.
Mrs Palin, in her usual charming manner, says to the chauffeur: "You get out and check - you were driving."
The chauffeur gets out, checks and reports that the animal is dead.
"You were driving; go and tell the farmer!" says Mrs Palin.
Five hours later, the chauffeur returns disheveled, drunk out of his head and with a big grin on his face.
"Goodness! What happened to you," asks Mrs Palin.
The chauffeur replies: "When I got there, the farmer opened his best bottle of whiskey, his wife gave me a slap up meal and their daughter made love to me.
What on earth did you say?" asks his boss.
"I knocked on the door, and when they answered I said to them, 'I'm Sarah Palin's chauffeur and I've just killed the cow.'"
Don't blame me, I nicked it from Mad Priest, who modified a Cherie Blair joke.