TRAVELED ON INTERSTATE WHEN THE WHEEL AND DRUM CAME OFF THE AXEL. WHILE CONSUMER WAS DRIVING AT APPROXIMATELY 65MPH, THE DRIVER'S SIDE AIR BAG DID NOT DEPLOY WHEN VEHICLE HIT A HILL IN MIDDLE OF REVENE. VEHICLE FLEW INTO MID-AIR, LANDING ON PASSENGER'S SIDE, STILL SLIDING BEFORE RETURNING TO UPRIGHT POSITION AND HITTING A SECOND HILL. CONSUMER WAS WEARING SEAT BELT.