Flash of a camera

  Graystone has recently moved to the west coast. He’s new in town and not at all familiar with how seriously the city takes the running of red lights and other accident causing violations in its traffic code.
  Friends have warned him that the city uses overhead automatic cameras as an aid to enforcement of traffic offenses.
  On this particular afternoon Graystone is driving downtown in the busy commercial district. He’s driving perhaps five miles over the speed limit when he notices the flash of an overhead camera.
  Graystone thinks, “That’s odd, I was only driving five miles over the speed limit.” So he circles the block and drives through the same intersection, this time driving at exactly the posted speed limit.
  Flash! The camera gets him a second time. Somewhat annoyed, Graystone circles the block a third time -- now driving ten miles below the speed limit. Again the camera flashes as he passes.
  Graystone is a hard-headed individual, and drives around the block a fourth time. This time he’s barely creeping through the intersection. Nevertheless, the camera gets him for a fourth time.
  Graystone drives home steaming over what he considers unfair enforcement. “It’s nothing but a speed trap,” he’s thinking.
  Impatiently he awaits his traffic tickets and has already made plans to hire a lawyer and go to municipal court to challenge what he considers unfair traffic charges.
  Finally, the envelope arrives. Nervously, Graystone opens the manila folder only to discover he has been charged with four counts of “failing to wear a seat belt.”