I think that's why I like cross-country running and hiking. It doesn't matter how terrible you feel, you still have to hobble all. the. way. home.
Like the village's yearly pilgrimage over the hills, for 50 km, by foot. The last 5 km or so, you literally are in a trance and can easily trip over small stones on the path because you can barely raise your feet. And it just seems to go on and on and occasionally someone just faints right away.