I WAS BRAKING AT A STOPLIGHT. AND HAD ALMOST COME TO A COMPLETE STOP, WHEN THE VEHICLE SUDDENLY ACCELERATED AND SHOT FORWARD. MY FOOT WAS ON THE BRAKE THE ENTIRE TIME BUT IT MADE NO DIFFERENCE. WHAT STOPPED ME WAS THE CAR IN FRONT OF ME. I REAR-ENDED IT WITH ENOUGH IMPACT TO PUSH THAT CAR INTO THE CAR AHEAD OF IT.*AK