TL* THE CONTACT OWNS A 2013 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE ATTEMPTING TO PARK, THE VEHICLE ACCELERATED INDEPENDENTLY AND CRASHED INTO A WOODEN STAIRCASE. THE CONTACT THEN SHIFTED INTO REVERSE AND THE VEHICLE ACCELERATED INDEPENDENTLY IN REVERSE, COMING TO A STOP IN THE STREET. THE VEHICLE WAS TOWED TO A DEALER FOR DIAGNOSIS. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. AN ENGINEER WAS DISPATCHED TO INSPECT THE VEHICLE. THE RESULTS WERE MAILED TO THE CONTACT, STATING THAT THERE WAS NO CAUSE FOR THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 899.