RedactedNarrative: Vessel traveling in a southbound direction took a sharp turn causing the operater to be thrown from the PWC. The operater struck his head on an unknown part of the PWC causing a laceration and severe contusion on the left temporal area. The operater was taken to Strong Memorial Hospital for treatment after being transported from shore. Operater had no recollection of the accident or the immediate aftermath and underwent surgery to remove skull fragments from the brain.  Operator tested for a BAC 0.03 at hospital several hours after accident.