RedactedNarrative: V1 had been boating for about 3 hrs when its occupants decided to go wakeboarding.  Occupant had been wakeboarding and fell off and as the boat was switching people, the boat was in neutral and Subject got back on board.  He was handing the life jacket to Subject2. As the boat was in neutral people were jumping off and pushing each other into the water.  Occupant3 yelled "don't push in victim because he can't swim."  Driver thought that he was joking and pushed victim into the water and stated that victim had told him earlier that he could swim when they were joking about swimming to shore.  Victim was at the surface for about 5-10 seconds before he disappeared under the water.