RedactedNarrative: Vessel #2 and Vessel #3 were docked and idle.  
  
  Vessel #1 was speeding and Operator #1 put Vessel #1 into reverse.  
  
  Operator #1 said he then slipped and fell onto the throttle.  
  
  Vessel #1 struck Dock #1 on its port side, then the port side of Vessel #2 with its aft starboard side before continuing around Dock #2 and struck the motor of Vessel #3 with its aft deck.  
  
  Vessel #1 passenger fell overboard but sustained no injuries.  
  
  Vessel #1 then floated out to the east and Operator #1 regained control.