No. I hadn't done anything wrong. I think the policeman know that but for the sake of getting on with his day and on to more important matters just asked me to get off the bus which, as he had some actual authority and not pretend authority like the bus driver or like I do, I did. The driver actually related events to him fairly accurately so it was clear I hadn't done anything worthy of action. At that point the policeman should, in my view, have told the driver to stop being so precious but I guess the easier path, as I'd got off the bus by then, was to leave it. All very silly.
It was in Edmonton, obviously...