A man walks into a pub and asks for a double scotch.
The Landlord asks, "are you alright" as the man looks a little shaken.
The man explained that his car had conked out a mile or so down the road. He had been scratching his head looking at the engine when a horse popped his head over the hedgerow and told him how to fix the problem.
"Arr, was it a black horse?" Asked the Landlord.
"Yes", said the man
"You wuz lucky then," said the Landlord. "There's a grey horse in that field, and he knows fuck all about engines".