WHEN PULLING INTO PARKING SPACE AT A LOW SPEED (2 MPH) CAR SUDDENLY ACCELERATED EVEN THOUGH ACCELERATOR PEDAL WAS NOT BEING DEPRESSED. OPERATOR'S FOOT WAS ON BRAKE PEDAL THE ENTIRE TIME BUT CAR WOULD NOT STOP UNTIL IT HIT A PARKED VEHICLE. AT THE TIME THE CAR WAS BEING TURNED TO THE RIGHT COMING INTO THE PARKING SPACE. THERE WAS A HIGH CURB (~10 INCHES HIGH) AT THE FRONT OF THE PARKING SPACE AND A MEDIAN BUT THE CAR JUMPED OVER THIS AND STRUCK THE PARKED ON THE OTHER SIDE OF THE MEDIAN.