PULLING INTO PARKING SPACE WITH TRANSMISSION IN DRIVE AND FOOT LIGHTLY ON BRAKE PEDAL, EASING UP TO CURB AT A "SLOW WALK" SPEED, THROTTLE WENT FULLY OPEN, CAR LURCHED OVER CURB THROWING DRIVER BACK INTO SEAT. BEFORE DRIVER COULD RESPOND BY BRAKING, THE CAR TRAVELED APROX. 20 FEET UP AN EMBANKMENT AND HIT A WATER PIPE RISER COMING TO A STOP. DRIVER PUT TRANSMISSION INTO PARK AND ENGINE IMMEDIATELY STOPPED REVING AND TIRES STOPPED SPINNING.*AK