ON 10/20/11, I STARTED MY CAR AND TURNED ON THE DRIVER SEAT HEATER TO 2, TO WARM THE SEAT. I PROCEEDED TO DRIVE TO A 9 AM APPOINTMENT WITHIN 2 MILES FROM MY HOME. AFTER DRIVING JUST A COUPLE BLOCKS, I SMELLED A SLIGHT BURNING SMELL, BUT THOUGHT IT NORMAL SINCE I HAD NOT USED THE SEAT HEATER IN QUITE SOME TIME; IT WAS JUST LIKE TURNING THE HEAT ON IN A HOME AFTER SEVERAL MONTHS OF NON-USE. WITHIN A FEW SHORT BLOCKS, I FELT A STING IN MY LEFT LEG AND THOUGHT IT COULD HAVE BEEN A PINE NEEDLE, SO I SHIFTED MY BODY POSITION TO ALLEVIATE THE ISSUE. AFTER A COUPLE MORE SHORT BLOCKS, ANOTHER STINGING SENSATION. AT THE NEXT STOP SIGN, I REACHED DOWN WITH MY HAND TO FEEL WHAT COULD BE CAUSING THE STINGING OF MY LEG. I FELT A HOT SPOT IN THE LEFT SIDE OF MY SEAT AND TURNED OFF THE SEAT HEATER SINCE MY SEAT HAD WARMED ENOUGH TO BE COMFORTABLE, BUT I DID NOT THINK MY SEAT WAS BURNING, SO I CONTINUED ON TO MY APPOINTMENT. I WENT IN TO MY APPOINTMENT AND CAME OUT TO MY CAR AN HOUR AND A HALF LATER. I NOTICED WHAT LOOKED LIKE A SMALL CIGARETTE BURN IN THE SEAT AND A HORRIBLE SMELL IN THE CAR. I RETURNED HOME AND TOLD MY BOYFRIEND ABOUT THE INCIDENT. *TR