THE VEHICLE WAS STATIONARY AT A STOP LIGHT. AS THE LIGHT CHANGED, I BELIEVE THAT I TOOK MY FOOT OFF OF THE BRAKE AND THE CAR STARTED ACCELERATING. I TRIED TO PUT THE FOOT BACK ON THE BRAKE BUT I HIT THE CAR IN FRONT OF ME BEFORE THE CAR STOPPED. I CANNOT BE 100% CERTAIN THAT THERE WAS NOT HUMAN ERROR INVOLVED, BUT ALL I REMEMBER IS FEELING THE ACCELERATION AND TRYING TO BRAKE AND BEING UNABLE TO STOP.