Don't know, I'd have to actually see it, it could be as straightforward as saying the dude isn't bound by conventional laws or causality, kinda straightforward. Or it could be a physiology thing, maybe he's from a world with different laws? Lots of things could lead to it, and lots of things could make it just res, or hell maybe it's ability negation? Maybe it's a magic dude who has a passive magic that negates laws from working on him? In that case it'd be neither but rather an ability of his own. And so on.
Context matters, for everything, not just this.