RedactedNarrative: BASED ON THE STATEMENTS AND THE EVIDENCE IT IS MORE LIKELY THAN NOT THE FOLLOWING OCCURED: 
  While DR1 and DR2 were switching operators of the Jet Ski, DR1 handed the PFD to DR2. DR1 failed to unplug the emergency cut off lanyard from the Jet Ski and the PFD before he handed it to DR2. As DR2 started to put on the PFD, the lanyard or the strap from the PFD caught the throttle of the Jet Ski causing it to start to accelerate without an operator on board. DR2 was holding the Jet Ski with his foot. The acceleration of the Jet Ski caused him to lose his balance and fall in the water (no injuries). The Jet Ski traveled south bound from the N Easy St towards E Hayden Lk Rd. The Jet Ski then collided with a dock located at E Hayden Lake Rd causing damage to it. The collision caused the Jet Ski to change directions and continued to accelerate west bound. The Jet Ski then collided with the Dike. The collision again caused the Jet Ski to change directions again and continued east bound towards E Hayden Lake Rd. The Jet Ski then collided with a rock wall located at E Hayden Lake Rd. This collision render the Jet Ski inoperable and had extensive damage. The Jet Ski's final 
  resting point was between the dock and the rock wall located at E Hayden Lk Rd.