INJURED STATED HE WAS OPERATING S CAR IN #2 ENTRY OF ORT. S CAR FELL INTO A WASH OUT STOPPING ABRUPTLY CAUSING INJURED TO STRIKE HEAD OFF CANOPY OF S CAR, JAMMING NECK AND BACK. INJURED FELL O UT OF CAR, CAR STAYED IN POSITION. EMT IN SECTION TREATED INJURED. ANOTHER EMT ARRIVED 15 MIN LATER TRANSPORTING INJURED TO SURFACE.