The contact owns a Ford F-150. The contact stated that the vehicle unexpectedly accelerated while in a drive through, a vehicle was ahead, the vehicle appeared to be rolling forward even though the foot was on the brake pedal. The front grill fender area was impacted. The other drivers vehicle the trunk and rear bumper were impacted. No additional property damage. No airbags deployed. No warning lights illuminated including any collision indicators. No injuries were sustained. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate mileage 15,002.