It's called the human factor. Nerves and muscles twitch. The best golfers in the world miss short easy putts. NBA players miss free throws and easy layups. Top baseball pitchers can't hit the broad side of a barn let alone throw a strike on any given day and get blasted for 10 runs. NFL quarterbacks throw more interceptions in one game than Aunt Jamima would if she started at QB that day. SH*T happens to humans.lol. So the best practitioner of CTE is on video hitting half his shots dead center and the other half dead next to the facing and this is random. No, it's caused by the speed of the shot. It's easy to make crazy claims but it becomes problematic when you actually have to demonstrate it.