ON 10-30-11 AT APPROXIMATELY 4:35 PM I PARKED MY 2008 TOYOTA TACOMA IN FRONT OF STEVE'S SMALL ENGINE, A BUSINESS LOCATED IN MONSON MA. AFTER PLACING THE VEHICLE IN PARK, THE TRUCK ACCELERATOR STUCK OPEN AND THE TRUCK LEAPED AHEAD WHILE I HAD MY FOOT OFF THE ACCELERATOR AND WAS DEPRESSING THE BRAKE AS HARD AS I COULD PUSH IT TOWARD THE FLOOR. MY VEHICLE STRUCK A PARKED PICKUP TRUCK IN THE TAILGATE. I IMMEDIATELY CALLED THE MONSON POLICE DEPT. AND REPORTED THE EVENT. THE MONSON POLICE RESPONDED AND A POLICE REPORT WAS FILED.