My friend in San Francisco has a friend who is clever at balancing on his bicycle whilst it is stationary.
He was performing this trick whilst waiting at a stop light. A police car was behind him.
When the lights changed and he crossed the junction the cops pulled him over. “You did not put your foot on the ground and therefore failed to stop.”
He was charged and hauled off to court.
It looked as though he would be found guilty but he endeavoured to explain his skill to the judge.
The judge seemed unbelieving, but told him to bring his bike into the court room and perform the trick.
He brought his bike in front of the judge and balanced for one minute without moving.
“Not guilty” said the judge.