RedactedNarrative: Vessel 2 westbound, Vessel 1 in front of and starboard of Vessel 2.  Vessel 1 suddenly and abruptly swerved left giving Vessel 2 Operator and passengers the impression that Vessel 1 Operator was going to attempt to jump a passing vessel’s wake.  Vessel 2 Operator stated he believed that Vessel 1 Operator did not see him and turned into the starboard side of Vessel 2.  
  
  Vessel 1 Operator stated that because of a passing vessel’s wake, he navigated to the left to avoid tipping over.  Vessel 1 Operator was under the impression that Vessel 2 struck or side-swiped Vessel 1.  Vessel 1 Operator struck his head in an unknown fashion and was thrown into the water.  Vessel 2 towed Vessel 1 into the marina.  EMS was on scene but Vessel 1 Operator refused medical treatment or transport.