I WAS STOPPED AT A TRAFFIC LIGHT, WITH THE BRAKE ENGAGED, AND MY CAR LUNGED FORWARD INTO THE CAR AHEAD OF ME, DAMAGING IT'S LIFTGATE (MINIVAN) AND BUMPER. I INITIALLY THOUGHT SOMEONE MUST HAVE REAR-ENDED MY CAR, PUSHING ME INTO THE OTHER CAR, BUT I WAS NOT HIT FROM BEHIND. MY FOOT WAS ON THE BRAKE THE ENTIRE TIME. I AM CONCERNED THIS MIGHT HAPPEN AGAIN, INJURING SOMEONE POSSIBLY IN A CROSSWALK, OR LUNGING ME INTO CROSS TRAFFIC.