RedactedNarrative: Vessel 1, Vessel 2, and Vessel 3 were in operation on the river with Vessel 3 several yards in front of the other two vessels.  The Operator of Vessel 1 and the Operator of Vessel 2 were trying to spray each other; in doing so, Vessel 2 made a sharp turn in front of Vessel 1, then stopped in the path of Vessel 1.  As a result, the bow of Vessel 1 made impact with starboard side of Vessel 2, injuring the leg of Vessel 2's Operator during the collision.  Both Operators (of Vessel 1 and Vessel 2 were ejected during the collision).  The Operator of Vessel 3, seeing the incident, turned around and came back to assist the Operators of Vessel 1 and Vessel 2.