A vessel, occupied two times, was towing two individuals on wake boards.  As the vessel approached it's home dock, the operator turned the vessel to port, allowing the two being towed to release the tow line and coast to the dock.  "Wake boarder one" released the tow line before "wake boarder two", therefore decreasing his speed before wake boarder two.  Wake boarder two then released the tow line, continued his forward motion and struck wake boarder one on the right side of his body.
McHenry