RedactedNarrative: V1 was at Lake Manawa's south boat ramp and had just pulled into the dock area to wait for passengers who were not there yet. The victim stated there was another boat in the way so he stopped next to the dock to look for a way to position his boat.  He decided to jump into the water & walk his boat around the dock to the other side. The victim walked up to the front (bow) of the boat & jumped into the water.  Upon leaving the boat, somehow his ring on his finger caught on something and ripped a gash in his finger as he was leaving the boat.  The victim refused medical attention at the dock and drove himself to the hospital.  The boat was not running at the time of the incident and the victim was not wearing a life jacket.