RedactedNarrative: OPERATOR was operating Vessel #1 while towing three individuals on an inner tube.  
  
  Tuber1 fell from the tube and suffered a dislocated left shoulder. He went to the hospital for his injury.    Tuber1 believes he hit the water hard and did not hit any object or person when he was injured.  There was no damage to the boat or tube.  OPERATOR believes they were near the Devil''s Gap area of Perry Lake in the Delaware River branch of the lake.