CAR TRAVELING AT 70MPH. CAR UNEXPLAINABLY ACCELERATES AND THEN MODERATE "POP" HEARD UNDER HOOD. DEBRIS NOTICED FALLING FROM CAR. CAR IS BROUGHT TO STOP ON SHOULDER. SMOKE EMINATING FROM UNDER HOOD. LATCH OF HOOD IS RELEASED TO INVESTIGATE WHEN FLAMES ERUPT. ENGINE IS ON FIRE. ELECTRIC COOLING FAN WAS MELTED AND DESTROYED. DAMAGE TO RADIATOR AND SURROUNDING COMPONENTS AND WIRING AS WELL AS HOOD, CHASSIS, AND TRIM PAINT DAMAGE.*AK