STOPPED AT THE TRAFFIC LIGHT AND PROCEEDED THROUGH THE INTERSECTION. THE VEHICLE WAS IN MOTION AND SUDDENLY ACCELERATED. TRIED TO SLOW THE VEHICLE DOWN USING THE BRAKE PEDAL WHICH WOULD NOT ENGAGE OR PRESS DOWN. CAR CONTINUED TO ACCELERATE FASTER. CONTINUED TO TRY TO BREAK THE CAR AND SLOW DOWN. BRAKES DID NOT RESPOND. TRIED TO CHANGE THE GEAR TO NEUTRAL OR PARK. CAR KEPT ACCELERATING. PULLED OFF THE ROAD INTO THE CURB AND THROUGH A FENCE. AS THE CAR WAS APPROACHING THE BUILDING AT HIGH SPEED. TURNED THE CAR OFF AND IT CONTINUED INTO A CONCRETE BLOCK COMMERCIAL BUILDING AND BOUNCED BACK ABOUT 15-20 FEET AND STOPPED AT THAT POINT. FRONT-END DAMAGE TO THE CAR. KNOCKED CONCRETE BLOCK WALL AND DOOR DOWN. BLESSED TO BE ALIVE. CAR WAS TOTALED. ALSO, THE AIR BAG DID NOT DEPLOY. POLICE SAID THAT THE THROTTLE MUST HAVE BEEN STUCK OPEN.