RedactedNarrative: Two personal watercraft were being operated in rough water during 20-30 MPH winds and each had an operator and a passenger. Operator #2 said that he and his son (Operator #1) were driving back and forth splashing each other with a wake and riding the rough waves. Accident occurred when Operator #1 entered the travel path of WC #2 and suddenly stopped moving. T-bone style collision occurred where PWC #2 struck PWC #1.
  
  Field investigation was conducted at the hospital while involved parties were being medically treated. Life jackets were being worn by all parties. The accident occurred out on the lake, but the involved subjects came ashore behind a lake home and the ambulance responded to that location.