I WAS APPROACHING A STOP LIGHT, TWO CARS WERE ALREADY AT FULL STOP, I APPLIED THE BRAKES AND MY CAR CAME TO A COMPLETE STOP APPROXAMETELY 10 FEET BEHIND THE CAR IN FRONT OF ME. ALL THE SUDDEN MY ENGINE STARTED LIKE MY FOOT IS ON GAS INSTEAD OF THE BRAKES, I PUSHED ON THE BREAKS AS HARD AS I CAN WITHOUT ANY RESPONSE, I HIT THE CAR IN FRONT OF ME. THIS IS THE FIRST TIME THAT IT HAPPEN. I DROVE THE CAR THIS AFTERNOON, IT IS DRIVING FINE. I WENT TO A PARKING LOT AND I APPLIED THE BREAKS THEN PUSHED GAS AT THE SAME TIME, THE CAR DID NOT MOVE. MY BREAKS ARE FINE. I DON'T KNOW WHAT HAPPEN AND WHY IT HAPPENED, BUT I KNOW FOR A FACT THAT MY BREAKS EWRE FULLY APPLIED, AND THE CAR WAS AT A COMPLETE STOP BEFORE IT MOVED ON ITS OWN. SKID MARKS WERE VISIBLE, BUT THE CAR KEPT MOVING.*AK