RedactedNarrative: On August 24, 2016, based on statements by (operator) and (friend/observer), Operator operating his Yamaha Waverunner had just exited the no wake zone at Shutes Branch on Old Hickory Lake when he gave the waverunner full throttle to test a new intake grate he had installed the weekend before and once the pwc got up to speed it made a sudden stop launching Operator over the handle bars of the pwc. Subject and other bystanders brought Operator back to the boat ramp. The only visible damage to the pwc was the intake grate that was mostly missing. Operator was transported by WEMA to Vanderbilt Hospital in Nashville, TN for his injuries.