BACKING OUT OF GARAGE IN A HIGHLANDER AND THE ENGINE SUDDENLY RACED W/O FOOT ON GAS PEDAL, CAUSING CONSUMER TO REACT BY APPLYING THE BRAKES. CONSUMER'S FOOT SLIPPED OFF BRAKE PEDAL AND LANDED ON THE ACCELERATOR RESULTING IN THE VEHICLE HITTING THE NEIGHBOR'S HOUSE. A 2003 CAMRY WAS SUPPLIED AS A RENTAL VEHICLE WHEN THE HIGHLANDER WASTAKEN FOR REPAIR. WHILE USING THE CAMRY, THE CONSUMER WENT TO APPLY THE BRAKE FOR A STOP SIGN AND INADVERTENTLY APPLIED BOTH THE BRAKE AND ACCELERATOR PEDAL. CONSUMER RAISED HIS FOOT THEN REAPPLIED THE BRAKE PEDAL (ONLY) AND WAS ABLE TO STOP BEFORE ENTERING THE INTERSECTION.