WHILE DRIVING ALONG THE PENNSYLVANIA TURNPIKE I HAD MY 1997 GMC JIMMY IN CRUISE CONTROL. I TAPED TO BRAKE TO TURN OFF THE CRUISE CONTROL. AFTER RESUMING THE CRUISE CONTROL THE VEHICLE BEGAN PICKING UP SPEED MUCH TO FAST. I AGAIN TAPPED THE BRAKE AND SHUT OFF THE CRUISE CONTROL. I THEN HEARD WHAT SEEMED LIKE A FLAT TIRE, I BEGAN PULLING OFF OF THE ROAD. AS I LOOKED IN THE PASSENGER SIDE MIRROR I COULD SEE FLAMES COMING FROM THE PASSENGER SIDE REAR OF THE VEHICLE. AFTER STOPPING THE VEHICLE I SAID TO MY MOTHER THE PASSENGER "THE VEHICLE IS ON FIRE GET OUT" AFTER SHE OPENED THE DOOR THE FLAMES TORNADOED AND CAME INSIDE THE VEHICLE AND STARTED EVERYTHING ON FIRE. I THEN PULLED MY MOTHER OVER THE CONSOLE AND DRAGGED HER AWAY TO SAFETY, THE VEHICLE IN LESS THAN 20 SECONDS WAS ENGULFED IN FLAMES. *NM