DRIVING MY 2008 TOYOTA TACOMA PRERUNNER (ODOMETER 12226). RETURNED FROM SHORT TRIP TO VISIT FRIEND (APPROXIMATELY 1.5 MILES AWAY). TURNED TO PULL INTO DOUBLE GARAGE. AUTOMATIC TRANSMISSION WAS IN LOWER GEAR 2 OR 3. BRAKED APPROPRIATELY TO STOP IN GARAGE. STARTED TO SHIFT TOWARDS PARK. ENGINE REV'D UP TO VERY HIGH RPM. REAR TIRES STARTED SPINNING FORWARD. VEHICLE STARTED MOVING FORWARD AGAINST BRAKES. APPLIED HEAVY BRAKES. ENGINE WAS STILL RACING. VEHICLE CONTINUED TO MOVE FORWARD, IMPACTING STORAGE CABINETS AGAINST WALL. ALL THIS OCCURRED IN 2-3 SECONDS. NO TIME TO REACT. RELATIVELY SLOW IMPACT (DUE TO BRAKES). FINALLY SHUT OFF ENGINE WITH KEY, BUT TOO LATE. . DAMAGE TO GARAGE WALL AND FRONT OF VEHICLE. NEVER HAD THIS PROBLEM BEFORE. RESTARTED ENGINE LATER, AND COULD NOT DUPLICATE PROBLEM IN DRIVEWAY. HAD VEHICLE CHECKED BY NEAREST DEALER NEXT DAY. THEY COULD NOT DUPLICATE PROBLEM. THEY HAD HEARD OF VERY FEW SIMILAR PROBLEMS. TECHNICIAN SAID ACCELERATOR PEDAL WAS STICKING SLIGHTLY... DEPENDING ON WHERE PRESSURE WAS APPLIED ON PEDAL. THIS WAS NOT LIKELY CAUSE BECAUSE FOOT WAS OFF ACCELERATOR PEDAL AND ENGINE IDLING AT LOW RPM BEFORE PROBLEM OCCURRED. TECHNICIAN ATTEMPTED TO DOWNLOAD PROGRAM UPDATE WHICH (I THINK) WOULD HAVE ELIMINATED AN 'INCREASED RPM TO BURN OFF EXCESS WASTE IN CATALYTIC CONVERTER'... BUT DID NOT DOWNLOAD BECAUSE THIS FIX WAS ONLY FOR VEHICLES WITH SUPER CHARGER. DEALER COULD NOT FIND SIMILAR PROBLEM IN THEIR DATABASE... BUT THEY'L