A police patrol sees a car weaving back and forth down the motorway. The officer picks up speed to catch up with it. Pulling up alongside the car he sees the driver is a little old lady, who is knitting as she drives.

He cannot believe it, and he shouts to her, “Pull over! Pull over!”

She yells back,

“No, it’s a scarf!”

It has been many years since I heard that little number, but I promise to keep my hands on the wheel and eyes on the road, when I drive.