I WAS PARKING MY CAR ON A COMMERCIAL COMPLEX. I AM PRESSING ON THE BRAKE AS THE CAR SLOWS DOWN. WHEN I FURTHER PRESSED ON THE BRAKE, THE CAR INSTEAD OF TAKING A COMPLETE STOP, ACCELERATED. IT HIT THE BUILDING IN FRONT OF ME. WHEN TRYING TO BACK UP, IT ACCELERATED AGAIN IN REVERSE. I PRESSED THE BRAKE REALLY HARD THEN IT STOPPED.