I WAS SITTING AT A STOP LIGHT AND WHEN THE LIGHT TURNED GREEN, I PROCEEDED TO DRIVE ABOUT 20 MPH. ABOUT 30 SECONDS LATER, I RECEIVED A HEAVY PUNCH IN MY CHEST AND STOMACH AREA. I YELLED, "WHAT IS GOING ON". I THEN NOTICED THE AIRBAG HAD DEPLOYED AND EXPLODED CAUSING MULTIPLE BURNS AND BRUISES TO MY ARMS, CHEST, CLAVICLE AND STOMACH AREAS. I WAS A LITTLE DISORIENTED AFTER THIS BUT MANAGED TO GET OUT OF THE CAR. ONCE OUT OF THE CAR, I NOTICED I HAD REAR-ENDED THE VEHICLE IN FRONT OF ME AND THE DRIVER WAS TELLING ME TO GET AWAY FROM THE CAR SINCE MY CAR WAS SMOKING. IT WAS 95 DEGREES THAT DAY AND I DID NOT HAVE THE AIR CONDITIONING ON. THIS WAS A DEFECTIVE AIRBAG.