You start running and I'll jump right in front of you. You will hit me from the rear, give you no time to react. I always believed that right of way means you must let others pass without forcing them to change their speed or direction. So even if you hit the back of the car that pulled just right in front of you, it is their fault, for forcing you to brake hard in order to avoid collision. Still, would like to know if I'm wrong - any lawyers?