ABOUT A MONTH AGO IN APRIL 2016, I PULLED INTO MY DRIVEWAY AND UPON PRESSING THE BRAKE PEDAL THE CAR SURGED AHEAD AND STRUCK MY GARAGE DOOR, DAMAGING IT. IN THIS INSTANCE I MOVED THE SHIFT LEVER INTO REVERSE TO STOP THE CAR. ON MAY17, 2016 AFTER PICKING UP MY GRANDSON FROM HIS SCHOOL, I EXPERIENCED A SUDDEN UNEXPLAINED ACCELERATION WITH NO DEPRESSION OF THE GAS PEDAL, AND DESPITE DEPRESSING THE BRAKE PEDAL AS HARD AS I COULD, WOULD NOT STOP UNTIL I HIT AND SEVERELY DAMAGED MY CAR AND 2 OTHER CARS, THEN WAS ONLY ABLE TO STOP THE CAR BY MOVING THE SHIFT LEVER INTO PARK. THIS WAS THE 2ND TIME I EXPERIENCED THIS PROBLEM, AND I AM VERY CONCERNED THIS CAN HAPPEN YET AGAIN AND CAUSE EVEN MORE SEVERE DAMAGE AND POSSIBLY INJURY.