THE FIRST INCIDENT OCCURRED WHEN I WAS ATTEMTING TO PARK BEHIND ANOTHER VEHICLE. WHEN I PUSHED THE BRAKE PEDAL, THERE WAS A SURGE OF ACCELERATION AND I COULD DO NOTHING BUT RUN INTO THE VEHICLE IN FRONT. THE SECOND OCCASION WAS SIMILAR, BUT, THIS TIME I WAS TRYING TO COME TO A STOP AT A BUSY INTERSECTION. WHEN THE BRAKE PEDAL WAS PUSHED, THERE WAS A SURGE OF ACCELERATION AND I HAD TO FLOOR THE ACCELERATOR PEDAL TO AVOID STRIKING AN ONCOMING CAR. *AK