I WAS CALMLY DRIVING SLOWER THAN 35 MPH ON A CITY STREET WHEN THE CAR SUDDENLY SLOWED DOWN AND STOPPED RESPONDING TO THE ACCELERATOR PEDAL. WHEN I TRIED TO STEP ON THE GAS I HEARD A BIG EXPLOSION-LIKE SOUND. THEN ALL OF A SUDDEN THE CAR ACCELERATED TO WHAT SEEMS LIKE OVER 100 MPH AND THE BREAKS DID NOT WORK DESPITE ME PRESSING THE BREAKS SEVERAL TIMES. I SHOT INTO 3 CARS AHEAD OF ME THAT WERE AT THE RED LIGHT. THE OTHER CARS RECEIVED SUBSTANTIAL DAMAGE; I SAW THAT OTHERS WERE INJURED. MY CAR WAS COMPLETELY DAMAGED/CRUSHED IN THE FRONT AND A FIRE HAD BROKEN OUT. THE AIRBAGS HAD DEPLOYED AND I WAS PRETTY MUCH PINNED TO THE SEAT. I HAD BOUGHT THE CAR FROM THE DEALER BRAND NEW AND HAD IT REGULARLY SERVICED AND MAINTAINED. I WAS THE ONLY DRIVER AND IT HAD ONLY 30000 MILES OVER 3 YRS.