DESCRIPTION OF ACCIDENT:1) STARTED THE AUTOMOBILE; SHIFTED THE GEAR INTO REVERSE WHILE HOLDING THE BRAKES AND GENTLY RELEASING IT.2) HE HIT TAP A LIGHT POST, ON THE LEFT BLIND SPOT, WHILE BACKING UP... SPEED LESS THAN 5 MPH. RESULT WAS A PAINT SCRAPE ON THE LEFT SIDE OF THE BUMPER.3)HE QUICKLY SHIFTED TO DRIVE TO MOVE A BIT FORWARD WHILE HOLDING THE BRAKE AND RELEASING GENTLY.4) THE CAR QUICKLY ACCELERATED AND "PLOWED" THROUGH A BRICK BARRIER ABOUT 12" THICK.5) AFTER TRYING TO CONTROL THE AUTOMOBILE, HE MADE A LEFT TURN CIRCLE AND COLLIDED INTO THE BUILDING THAT CONTAINED THE BRICK BARRIER WALL.6) DURING THE IMPACT OF THE BARRIER WALL, HE NOTICED THAT THE AIRBAG DID NOT FULLY DEPLOYED. ONLY AFTER THE IMPACT WITH THE BUILDING DID THE AIRBAG INFLATE FULLY, BUT SLOWLY.