Many years ago, in the days of Vauxhall Cavalier repmobiles, a colleague of mine was stopped on the M5 one typical yukky, wet and windy dark November friday night whilst on his way home to Bristol.
The police car pulled up behind him on the hard shoulder, and out got the officer in full foul weather gear beckoning my colleague to join him at the rear of the Cavalier. Of course, bedecked only in shirt and suit trousers, his jacket hanging in true rep fashion behind the drivers seat, he was somewhat exposed to the elements, in complete contrast to the police officer.
Whilst at the rear of the car the officer bade him to kneel down and look underneath his car. I've just followed you for a few miles and thought I saw something hanging underneath your car sir, said he in pleasant police speak, can you see anything at all under there? When my colleague answered in the negative, the officer said "Oh, I'm sorry, it must have been your right foot, drive a bit slower for the rest of journey"
With that he wheeled away back to his patrol car leaving my somewhat saturated and weatherbeaten colleague to rue the error of his ways.
Mike.