The Tail End Of Repairs

(I just got my car repaired after getting rear-ended, and after getting home I notice that the rear windshield-wiper is installed upside down, so instead of swinging up over the windshield it swings down over the license plate. I take it back to the shop.)

Repairman: “Sorry about that error, but fortunately I can fix it in two shakes of… well, of the car’s tail.”