RedactedNarrative: Vessel #1 was traveling South on Indian Lake in the open zone, when the operator began to slow the vessel down.  Occupant #5 was kneeling on the front right seat, facing the bow.  The momentum of the vessel caused occupant #5 to go over the bow of the vessel and into the water.  The operator immediately shut off the engine.  Occupant #5 went under the vessel and surfaced behind it.  Occupant #5 was brought back onto the vessel.  Occupant #5 leg was noticeably injured.  Vessel #1 headed to Blackhawk boat ramp to meet EMS.