RedactedNarrative: Owner1 is the owner of Bear Lake Funtime, a concessionaire at Bear Lake State Park.  Owner1 has recently added a "FlyDive" system to his rental fleet.  With a FlyDive, the propulsion from a jet ski is re-directed via a hose so that it comes out through the bottom of a platform.  The platform is divided in half and the "passenger" can control their direction by rotating the parts of the platform.
  
  On Monday, July 4, 2016, Owner1 was on the platform and had completed several maneuvers some of which included raising above the surface of the water and then diving headfirst back into the water.  (This is sometimes referred to as "dolphining.")  Owner1 was performing such a maneuver and struck his head on the lake bed.  
  
  I first made contact with Owner1 at the shoreline.  He was lucid and able to explain what had happened.  He described striking the bottom.  He said that his back hurt and that he had broken some teeth.
  
  Owner1 immediately felt pain in his back.  He moved towards shore.  He received his initial medical treatment at the shoreline.  Once he was placed on a backboard and immobilized by EMS personnel, he was carried to an ambulance and then transported to Logan Regional Hospital where he underwent surgery for a cracked vertebra.
  
  The "operator" of the FlyDive was subject2.  The operator has no directional control and can control just thrust.  I spoke with Subject2 on  Friday, July 8, 2016.  He told me that he had seen Owner1 make several dives.  On the last dive, Subject2 said Owner1 appeared to stay down just a bit longer than usual.  Subject2 said that Owner1 surfaced, signaled for Subject2 to cut off the thrust (which Subject2 did), came to the side of the PWC and immediately said that he had hurt his back.  Subject2 said that Owner1 then slowly directed the vessel to the sandbar where Subject2 helped Owner1 remove the equipment.
  