I spent one of the hottest summers on record couchsurfing around Europe. The heat and the casual accommodations both truncated my sleep significantly. I thoug

I spent one of the hottest summers on record couchsurfing around Europe. The heat and the casual accommodations both truncated my sleep significantly. I thought I'd cool off by going mountain biking in the Alps. I didn't realize how tired I was until I got to the top of the lift. It was fucking terrifying! Doing regular vacation stuff like eating and talking to people was totally fine - I hadn't even noticed I'd accumulated a sleep deficit. But the attention and the quick reflexes extreme sports require are another matter entirely.