RedactedNarrative: OPERATOR ONE INCREASED THE THROTTLE PRIOR TO INSURING ALL PASSENGERS WERE SEATED PROPERLY INSIDE THE ENCLOSED RAILING OF THE VESSEL. THE PASSENGER FELL OUT OF VESSEL ONE AND GOT HIS LEG CAUGHT IN THE LOOP OF THE TOW ROPE.  AS THE ROPE WENT TIGHT , IT CONSTRICTED ON THE LEG CAUSING A SEVERE LACERATION.