»Uh-oh, cops!

"You are not going to go interact with those police!" said Mary to Aram, as we all stood on the stoop and watched a fixie rider explain to two SFPD how a fixed-gear bicycle works.
Greg had ridden his new bicycle over to the stoop, and Aram and Mary pulled up in their shiny just-washed car, and just as jimg walked up, the police blazed by with bullhorns roaring.
The outcome: the cyclist got a lecture and a ticket; the policemen got a bewildering explanation of how a fixie works; and Aram did talk to the police (after the tickets were written and the cyclist on his way).