RedactedNarrative: Vessel 1 was following Vessel 2 headed south.  The operator on V2 slowed her speed then Vessel 1 struck Vessel 2 in the rear.  The impact caused the back two occupants on Vessel 2 to be knocked off Vessel 2.  The operator of Vessel 1 stated he tried to turn when he noticed Vessel 2 slowing.  He stated he let off the throttle and tried to lean to get the jet ski to turn by leaning to the side.  This action would leave Vessel 1 unable to maneuver.  This also showed Vessel 1 was operating too close to Vessel 2.  The two back occupants on Vessel 2 were transported for their injuries.