RedactedNarrative: V1O1 was attempting to unload passengers at the dock and lift of V2.  While pulling up perpendicular to the end of the dock, V1's starboard side started to swing to the north toward V2 which was located on a boat lift attached to the east side of the dock V1 was unloading onto.  When O1 observed V1 nearing contact with V2, O1 attempted to move toward the back of V1 in attempt to catch the starboard side.  While moving to the back of V1, O1's shorts caught the throttle of V1, forcing V1 reverse gear and slamming V1 into both V2 and the boat lift V2 was located on.  
  
  End of report.