Imagine a driver making his way home after a long day’s work with his mind on a myriad things. Perhaps he is thinking about the football score, the lottery drawing, the weekend, or any number of things. He comes over a hill when suddenly from out of nowhere a pedestrian steps out into the street. He slams on the brakes but, in his mind, knows it is too late. There is a terrible moment immediately before the impact where the driver is hoping that there may just be enough time to stop or perhaps swerve out of the way; then, the awful impact. From the moment of any accident the driver must immediately decide, should I stay or should I go?