TL* THE CONTACT OWNS A 1997 FORD F-150. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 60 MPH, THE VEHICLE UNEXPECTEDLY INCREASED ACCELERATION TO 90 MPH. THE GEAR LEVER WAS SHIFTED INTO NEUTRAL AND THE ENGINE BEGAN TO REV AS THE VEHICLE SUDDENLY FISH-TAILED. AS A RESULT, THE REAR OF THE VEHICLE CRASHED INTO A NEARBY MEDIAN BARRIER. THE VEHICLE CONTINUED TO ACCELERATE FOR ANOTHER 5 MILES. THE CONTACT SHIFTED FROM DRIVE TO NEUTRAL REPEATEDLY, AND THE VEHICLE REDUCED SPEED AND WAS MANEUVERED TO A SAFE LOCATION. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER WHERE THE TECHNICIAN INFORMED THE CONTACT THAT THE FLOOR MAT WAS TRAPPED UNDER THE ACCELERATOR PEDAL, CAUSING THE ABNORMAL ACCELERATION FAILURE. THE CONTACT STATED THAT THE FLOOR MAT WAS NEVER POSITIONED UNDER THE ACCELERATOR PEDAL WHEN THE FAILURE OCCURRED. THE VEHICLE REMAINED AT THE DEALER FOR FURTHER INVESTIGATION. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 119,000.