 Some drivers will leave change under their seats.Others use one coin to scratch the car, based on the (false) belief that since the car is new and nothing has happened to it yet, the chances of something bad happening to the car is greater when compared to a used car which already has its fair share of dents and scratches.In hopes of preventing a high damaging accident, they will place a small nick or scratch on the car in an area where it will not be seen.