VEHICLE WAS PUT IN REVERSE ,WENT IMMEDIATELY INTO HIGH SPEED BACKWARDS, HIT TREE DRIVER. PUT VEHICLE INTO NEUTRAL ,JUMPED GEAR INTO DRIVE, BRAKES DID NOT HOLD ,HAD TO HIT ANOTHER TREE IN ORDER TO STOP.THROTTLE STUCK WIDE OPEN WHICH CAUSED THE VEHICLE TO GO OUT OF CONTROL, RESUTLING IN INJURIES TO DRIVER. *AK