There's a moment in a 100-mile race — usually somewhere around mile 70 — where your nervous system stops cooperating. It's not a physical breakdown, exactly. Your legs still work. You're not injured. But something shifts. The part of your brain that makes rational decisions, that remembers why you're doing this, that believes finishing is possible — it goes quiet. What's left is just noise. Threat signals firing in every direction. A body that has decided, on a cellular level
