WAS DRIVING VEHICLE APPROXIMATELY 40MPH WHEN AIR BAGS PARTIALLY DEPLOYED. ONE ON DRIVER'S SIDE WAS IN FLAMES. THEN, PASSENGER'S SIDE STARTED TO BURN. NO INDICATIONS OF AIR BAG AREAS BEING HIT OR VEHICLE HITTING ANYTHING WHEN IT HAPPENED. VEHICLE WAS A RENTAL FROM ENTERPRISE.*AK THE DRIVER SAYS SOME ONE HIT HIM JUST BEFORE THE AIRBAG DEPLOYED. *YH