We had developed a habit of riding invisible motorcycles around the corridors of our secondary school, accompanied by sound effects. As this was done without regard for the health & safety of non-participants, the headmaster saw fit to ban the practice.

One day he had caught Kenneth Keene and James Spencer joyriding in the corridor, and was in the middle of giving them a ticking off when another 'biker' came tearing past them. The furious head shouted at Ken to go after the boy and bring him back, so Ken climbed on his imaginary bike, kickstarted it and roared off in hot pursuit.