something over and over again without any fear its awesome, but occasionally you hit a mental block and the fear/mental aspect dominates.
Sometimes I wonder if this is something that happened with Jake Heaps or Tanner Mangum, they had played the game robotically/automatically for years and years at an extremely high level and then *snap* they couldn't get out of their own heads.
Kind of a silly example, but one that has stuck with me for years
I used to run on top of walls as a kid, like legit run/full on sprint from my backyard across neighbors yards on our shared brick wall that went the length of my entire culdesac etc
For years I could run without any problem, never a thought or fear of falling I had done it hundreds/thousands of times.
At one point mid run I suddenly lost that fearlessness the assurance that I would never fall, and I wobbled. It took a while before I was comfortable enough to run with my friends again, instead I would walk much more slowly than them. I "knew" I could do it and I had never fallen before, but something in my brain flipped and I couldn't do it anymore.