https://nautil.us/the-strange-brain-of-the-worlds-greatest-s...
https://nautil.us/the-strange-brain-of-the-worlds-greatest-s...
(Source: I'm also a climber. Not remotely close to Alex's level. But frequent exposure significantly changes how your brain processes these situations)
When that happens I have to do a mental inventory and ask myself, "Am I better off finishing the run or should I just bag it and take tomorrow off?" Two things; firstly every run hurts a little bit - especially the first mile. I usually get into a groove and sometimes, very rarely, I really have gotten to that place where I'm feeling no pain and a run seems like less effort then a walk - mostly though the nice part of a run has an undeniable unpleasantness bound up with it. I like being able to go out for a run though so I put up with the bad. Second thing. I'm an unreliable source. For all the reasons I just talked about I don't trust my ability to take stock of my physical state. I do occasionally take off or skip for days at a stretch but it's like candy - I don't trust it because I like it so.
Here's the thing. If I get that balance wrong I end up walking in the middle of my run.
I imagine Honnold has to do that same self assessment. If he gets it wrong he plunges to his death. Which - to my mind - is totally crazy. Takes all kinds though.
The scientist found there was a gene encoding how daring a bird would be, mostly clustered in two groups IIRC. But there was a rare variant which made them much more fearless, causing them to go much lower than the others.
However they only found birds with one copy of that variation. Turned out if a bird inherited the variant from both parents, they never pulled out of the dive and smacked into the ground, killing the bird.
These crazy free solo climbs and similar reminds me of those birds.