RedactedNarrative: On Saturday September 4th at approximately 1630hrs there was a vessel collision with a person on Percy Priest lake. OP2 and OP1 were riding PWC''s. OP2 was ahead of OP1. She lost control and fell off of her vessel. OP1 took his hand off of his throttle and attempted to steer his vessel to the left. The bow of his vessel struck OP2 in the head. OP1 was able to get her on his vessel and transport her back to family member who took her to shore. OP2 was admitted to Vanderbilt.