RedactedNarrative: UNIT 1 WAS PULLING A TUBE IN WIMBEE CREEK WHEN IT STRUCK A SAND BAR.  ONE OF THE OCCUPANTS WAS STANDING IN THE BOAT AND FELL FORWARD WHEN THE BOAT HIT THE SAND BAR.  THE OCCUPANT STRUCK THEIR RIGHT SIDE ON A SEAT.  THE INJURED OCCUPANT WAS TAKEN BACK TO THE LANDING AND MET EMS.