RedactedNarrative: The vessel was traveling east by southeast up the canyon at a measured 10.5 mph pulling a wake-surfer.  The towed individual began pulling himself along the tow rope to get closer to the vessel and fell backwards into the water.  His right ankle was ensnared by the tow-rope and he was briefly drug through the water until the vessel operator was told to stop by the lookouts.  The towed individual suffered soft-tissue damage to his right ankle (unknown if ligaments or tendons were torn) resulting in his needing to use crutches.