Arguably a single datapoint doesn't allow you to discern which caused what....

Did being alone underground for months warp his mind...?

Or do you have to be pretty bent to start with to do what every non-warped person doesn't do, because they can foresee it would really suck....

if thats the case, im wondering, do people on northen hemisphere perceived time differently than people on equator? since the day/night sun cycle is different?

I find the “no light” bit in the subtitle confusing, as the article says he had “a torch as his only light source”. I get that a torch is not much light, but it’s still significantly different from “no light”. Or maybe they meant “no daylight”, but that seems hardly worth to mention for a cave.