I WAS DRIVING MY 2007 TOYOTA CAMRY WHEN SPARKS FLEW FROM UNDER THE DRIVERS SIDE FRONT SEAT, THEN CAME A POPPING SOUND. THIS HAPPENED AGAIN, BUT THIS TIME A FLAME CAME AFTER THE SPARKS. I WAS DRIVING AROUND 55 MPH WHENEVER THIS HAPPENED, AND I WAS ON A VERY BUSY FREEWAY DURING RUSH HOUR (5:30 P.M.) TRAFFIC. I WAS ABLE TO PULL OFF TO THE SHOULDER, BUT BY THEN THE FIRE WAS SPREADING ACROSS THE DRIVERS SEAT. I WAS ABLE TO STOP BY USING THE TIP OF MY TOES TO APPLY THE BRAKES. THE FIRE BURNED MY PANT LEGS SIGNIFICANTLY, WHILE BURNING A COUPLE AREAS OF MY CALVES. THE FIRE DEPARTMENT WAS ABLE TO PUT THE FIRE OUT, BUT BY THEN MY CAR WAS TOTALED. THE FIREMAN AND MY INSURANCE INVESTIGATOR STATED THAT THEY BELIEVED THE FIRE STARTED BECAUSE OF ELECTRICAL, WHICH MAY HAVE BEEN FROM MY POWER SEATS. LUCKILY, MYSELF NOR ANYONE ELSE WAS KILLED DURING THIS HORRENDOUS ORDEAL.