RedactedNarrative: VESSEL-1 AND VESSEL-2 WERE HEADING SOUTHWEST ON LAKE TENKILLER IN THE HORSESHOE BEND AREA.  V-2 WAS AHEAD OF V-1 AND V-1 PASSED ON V-2 STARBOARD SIDE.  V-1 MADE A HARD TURN TO THE STARBOARD SIDE IN AN ATTEMPT TO THROW OR SPRAY WATER ON V-2.  THE PASSENGER OF V-1 WAS THROWN OFF THE PORT SIDE AND STRUCK V-2'S BOW.  V-1 PASSENGER WAS RETRIEVED FROM THE WATER AND TAKEN TO SHORE.