Because he's a dog. Dogs cannot drive.
Lock them both in the trunk of the car for an hour, then open it up and see which one of them is happier to see you.
They have two left feet
It kept crashing on the beach.
They didn't study.
Start in England and drive West.
Are ye alright in the back there lads?
A yellow license plate.
He made a few Wookiee errors.