How can the brain both be the one telling me to slow down, while also telling me to keep going?

This is just a rhetorical question honestly, but if someone smarter than me has an answer feel free to. But holy, I'm flying straight down the steepest peak because I was convinced to hit the double black, and I know I should let myself get to the bottom to hit the lodge and hydrate and chill, but I also feel like I should should just go past the lodge through the trees and go to the next lodge and do the same thing until I'm completely at the bottom. Now I understand how self control in saving the bag for another day is so difficult.