Years ago, I was involved in a traffic accident... a 4-car crash .... first car stopped, second car (me) stopped, third car stopped, fourth car brakes failed... he hit the third car, that hit mine, and hit the first... Fourth car was a rich guy... paid for all the damages... After that time, I'm always very cautious of what's behind me ... when ever I hit my brakes, I automatically look whats behind me.... a habit not everyone is doing...