RedactedNarrative: VESSEL #1 WAS ANCHORED IN THE NW BAY OF THE MAIN LAKE.  THREE PEOPLE WERE PLAYING ON A TUBE TIED TO THE BACK OF VESSEL 1.  VESSEL #2 WAS PULLING A TUBE WITH RIDERS.  VESSEL #2 BEGAN CIRCLING AROUND VESSEL #2 AND ON THIRD CIRCLE COLLIDED WITH VESSEL #1 CAUSING DAMAGE AND INJURIES when two people on V1 fell in the boat.