WHILE TRAVELING AT 50 MPH, DAY-TIME, SUNNY, DRY, WITHOUT CAUSE THE VEHICLE BEGAN TO SWAY - ABOUT 50 YARDS, THEN VEHICLE ROLLED OVER THREE AND ONE HALF TIMES, SLID DOWN HIGHWAY APPROXIMATELY 50 FEET, ON ITS TOP. VEHICLE END ON ITS SIDE WITH ROOF IN TO THE STEERING WHEEL, ALL WINDOWS BROKEN, AND WINDSHIELD SHATTERED.