RedactedNarrative: On or about 8/28/2020 two Yamaha PWCs, rented from Flat Hollow Marina, were being operated by a Operator 1 and a Operator 2 who were traveling upstream on Norris Lake in the vicinity of Flat Hollow Marina.  Operator 2 was ahead of Operator 1 who was following behind approximately 50 ft. from the vessel operated by Operator 2.  As they rounded the bend just upstream from the Marina the PWC operated by Operator 2 hit a large wake and turned abrubly to the left causing Operator 2 to be thrown off the PWC and into the path of the vessel operated by Operator 1.  Operator 1 turned sharply to the right but was unable to avoid striking Operator 2 in the head with the PWC, causing serious injury to Operator 2.  The abrubt turn threw Operator 1 off of his PWC and into the water along with the injured party Operator 2.  Operator 1 swam over to Operator 2 where they were picked up by a pontoon boat and transported to Flat Hollow Marina.  Operator 2 was transported via Lifestar to UT ER were he was treated for head injuries and released.  Per 69-9-217 (d)(3) and 69-9-217(h)Operator 1 was asked to submit to BAC testing with which he complied, Operator 2 was also asked to submit to BAC testing, which he refused.  BAC testing results from Operator 1 were negative for alcohol.