I kitesurf, there are some tricks that I find very scary, I both want to try them and find them too scary to do.
Sometimes its easier to hand off control to my monkey brain, I'm not sure who it is inside me, but they find it easier to ignore the fear that holds human me back.
I feel like there is Mr Low-level (maybe lizard brain?) who takes over when I'm super sleepy or driving or walking and listening to podcasts. There is monkey brain who is reckless and doesn't mind what happens to the physical self. Then there is me, I'm usually in charge.
The interactions are more complex and nuanced than I can write here.