WHILE DRIVING VEHICLE BEGAN TO STEER OUT OF CONTROL, RESULTING IN A SKID ACROSS THREE LANES INTO THE MEDIAN. BEFORE COMING TO A STOP, IT FLIPPED OFF AN OPENING IN THE MRDIAN WHERE A ROAD RAN UNDERNEATH AND LANDED UPSIDE DOWN ON THE ROOF OF THE CAR ONTO THE ROAD 15-20 FEET BELOW. PASSENGER'S SIDE WAS COMPLETELY CRUSHED, WHEREAS DRIVER'S SIDE REMAINED INTCT. CONSUMER SUSTAINED A BLACK EYE/WHIPLASH/MANY BRUISES, AND GENERAL TRAUMA. VEHICLE WAS TOTALED. *AK