I WAS PARKING MY CAR AND MY FOOT WAS FIRMLY ON THE BRAKE. JUST AS I WAS GOING TO SHIFT MY CAR INTO PARK, THE ENGINE REVVED AND THE CAR SURGED FORWARD I WAS UNABLE TO STOP THE CAR, IN SPITE OF BRAKING. THE CAR JUMPED THE CURB IN THE PARKING LOT AND ENDED UP STOPPING ON TOP OF A LANDSCAPING BOULDER. THIS STOPPED THE CAR FROM MOVING FORWARD AS THE FRONT OF THE CAR WAS ON TOP OF THE ROCK, BUT THE ENGINE WAS STILL REVVING AS I PUT THE CAR IN PARK AND TURNED OFF THE IGNITION. TRANSMISSION PAN AND ENGINE CRADLE DAMAGED BY COLLISION. HAD THE LANDSCAPING BOULDER NOT BEEN THERE, THE CAR WOULD HAVE CONTINUED INTO THE BUILDING IN FRONT OF ME.