Yeah, I'm always amazed what young people can get away with on the spur of the moment.

Was in Kyrgyzstan recently, and there's a popular hike that everyone does (Ala Kul). But it's HARD. And the people that do it are often not hikers. It's 3 days, but it involves a massive climb at altitude, and you have all these random backpackers attempting it because...well, that's what you do. And by and large they all seem to get through it ok.