The walls were moving, and I didn’t know where my guide was.
I was squatting, pants-down, over a pit toilet within a crudely constructed turquoise shed somewhere around 15,700 feet in the Andean foothills of Peru, trying desperately not to puke. The walls appeared to be having a rave of their own, swaying rhythmically to and fro like one of those inflatable arm waving men you see outside of used car dealerships. Mind you, the walls were not actually alive. They were static, as ordinary outhouse walls tend to be. I was the one collapsing. I was trapped in the psychedelic hellscape that only severe altitude sickness can bring, and I was terrified.