WHILE RUNNING, THE VEHICLE BEGAN SMOKING, INITIALLY COMING FROM UNDER THE VEHICLE. FIRE BEGAN COMING OUT OF THE ENGINE COMPARTMENT. BRAKES THEN FAILED COMPLETELY. I WAS ABLE TO PUT TRANSMISSION INTO PARK, WHICH EVENTUALLY STOPPED THE VEHICLE, AFTER CRASHING THROUGH A GATE SECURITY BARRIER.(NO BRAKES AT THAT TIME.). FIRE COMPLETELY DESTROYED THE ENGINE COMPARTMENT AND HOOD OF THE VEHICLE, AS EXPLOSIONS OCCURRED.