MY VEHICLE WAS STATIONARY AT A RED LIGHT WAITING TO TURN LEFT ON A CITY STREET IN PARK, AS I TRIED SHIFTING GEARS BACK TO DRIVE THE CAR JERKED FORWARD VERY INTENSELY ' WHICH IT HAS DONE MULTIPLE TIMES BEFORE' . BEFORE REACHING THE DRIVE POSITION. IT THEN PROCEEDED FORWARD OUT OF MY CONTROL INTO THE BACK OF A TRUCK LINKING MY FRONT BUMPER TO THE HINGE ON THE BACK OF THE TRUCK.. IN THE MIDST OF THAT I IMMEDIATELY TRIED SHIFTING INTO REVERSE BUT DOING SO WAS VERY DIFFICULT HAS THE CAR KEPT PRESSING FORWARD INTO THE BACK OF THE TRUCK, SO I PUT THE CAR IN PARK THEN BACK TO REVERSE WHEN IT FINALLY SHIFTED INTO THE REVERSE GEAR VIGOROUSLY WHICH THEN ABLED BE TO DETACH FROM THE TRUCK. I PULLED TO THE NEAREST PARKING LOT TO CHECK THE DAMAGE, AND SEEN MULTIPLE LEAKS NOT SURE WHERE FROM.