RedactedNarrative: Operator1 was operating vessel 1, following vessel 2 in Navajo Canyon.  Vessel 1 was an estimated 30 to 48 feet behind vessel 2, traveling at an estimated speed of 15 miles per hour.  Vessel 2 was also traveling at a read-speed of 15 miles per hour.  
  
       Vessel 2 was abruptly placed in neutral power by its operator.  Operator1 did not notice that change in speed until too late.  Vessel 1 struck vessel 2 in the stern, ramped upward and into the passenger compartment of vessel2, striking occupant in the head and face, and came to rest completely inside the passenger compartment of vessel 2.  Ocucpant was unresponsive and stuck underneath vessel 1.  
  
       Operator2 then operated vessel 2 at maximum speed all the way to Antelope Point Marina where vessel 2 was moored in slip.