I WAS STOPPED AT A LIGHT WITH SEVERAL CARS IN FRONT OF ME. WHEN THE LIGHT CHANGED AND THE CAR AHEAD OF ME MOVED AND WAS ABOUT 15 FEET IN FRONT I TOOK MY FOOT OF THE BRAKE AND THE CAR ACCELERATED FORWARD WITH OUT ME TOUCHING THE GAS PEDAL. I WAS STARTLED AND I SLAMMED ON THE BRAKES. THE CAR DID NOT SLOW DOWN AT ALL AND ONLY THE REAR END OF THE CAR IN FRONT OF ME STOPPED MY CAR. I LOOKED DOWN AT MY FOOT TO MAKE SURE I HAD HIT THE BRAKES AND NOT THE ACCELERATOR. MY FOOT WAS SQUARELY IN THE MIDDLE OF THE BRAKE PEDAL. NORMALLY WHEN THE BRAKES ARE HIT HARD THE FRONT END OF THE CAR DIPS AND THE SUDDEN STOPPING OF THE CAR JERKS THE DRIVER FORWARD. NONE OF THIS HAPPENED UNTIL MY CAR HIT THE CAR IN FRONT OF ME. *JB