RedactedNarrative: Vessel 1 was operating in the area of Buttonwood sound.  Operator jumped a wake caused by another unknown vessel.  The personal water craft (pwc) and both occupants were launched off into the air.  The occupant fell overboard and landed in the water behind the pwc. The operator accelerated the personal water craft soon after the craft  landed back in the water causing a highly pressurize jet stream of water to pierce the perineal area of the occupant, causing internal injuries to his intestine and intestine valve. The occupant was airlifted to Jackson Memorial Hospital in Miami. Occupant will undergo several surgeries to repair his injuries, and continue receiving treatment in the Intensive Care Unit. Operator was not injured. Both, operator and occupants were wearing a solid class III PFD. Written Warning was issued to  the operator for Careless Operation.