RedactedNarrative: Owner was taking operator/victim for a ride. Operator was sitting between owner and handlebars. Owner started PWC and was attempting to put lanyard for kill switch around his left wrist at the same time looking behind him to make sure no other kids were around. At that time the operator (4yr old) hit the throttle sending the owner of the PWC off the back of it and into the water. The operator went out across the lake. The owner got on another PWC attempting to catch up to the operator, but was unsuccessful. The operator stopped about halfway across the lake, turned left and went full throttle again until he hit shore and launched into the air and struck the boathouse. When the owner of the PWC arrived the operator was still sitting on the PWC with the throttle still pulled all the way back. Owner pulled out lanyard to stop the PWC and grabbed the Operator to go get help. 
  
  The PWC left the water and struck the boat house that was approximately 30-35 feet from shore. The first marks in the ground from the jetski were at approximately 24 feet from shore. The PWC went through a small dingy that was leaning up against the boat house where the Operator hit his head on a broken edge of the dingy causing a laceration to his head.