RedactedNarrative: A 17 year old male Operator was towing 3 persons on a tube (2 17 year old males and a 15 year old male) past Bell Buoy #6.  Operator drove the boat between 10-20 mph approximately 10-15 feet from the buoy in an attempt to cause the boat's wake to ring the buoy's bell.   Another boat's wake caused the tube to slide towards the buoy.  The Injured person hit the bell buoy.  There was no observer in the boat watching the tubers.  