CONSUMER WAS TRAVELING ABOUT 45MPH ON THE HIGHWAY AND STEERING WHEEL STARTED VIBRATING. ALSO, THEY HEARD A POPPING NOISE COMING FROM THE BACK. RIGHT REAR TIRE WAS FLAT. CONSUMER PULLED OVER TO THE SHOULDER TO CHANGE THE FLAT TIRE, AND CAR WENT OUT CONTROL, AND WHIPPED INTO FOUR LANES ON THE HIGHWAY. CAR WAS TURNED THE OPPOSITE WAY OF THE TRAFFIC. *AK