WHILE IN A DRIVE THROUGH LINE AND IN "DRIVE" POSITION, VEHICLE SUDDENLY ACCELERATED, CAUSING VEHICLE TO REV UP AND HIT VEHICLE IN FRONT. DRIVER TURNED WHEEL TO KEEP FROM THE HITTING THE VEHICLE IN FRONT. BUT VEHICLE STILL ACCELERATED. DRIVER HAD TO PLACE VEHICLE IN THE "PARK" POSITION, AND VEHICLE STOPPED. LATER THAT NIGHT, OWNER DROVE VEHICLE TO A DEALERSHIP. BUT DID NOT EXPERIENCE THE PROBLEM AT THAT TIME. PLEASE PROVIDE FURTHER INFORMATION.*AK