Both should get a free pass, is the point, because it's a fantasy world. Just because a hero's antics in a fantasy world aren't supernatural, doesn't mean he's facing the same natural limits as an ordinary person (or even an extraordinary one) IRL.
A cornerstone of science is that the same physical laws apply to everyone and to everything, everywhere in the universe. It's positively axiomatic, today, but it's relatively new.
In a fantasy world, it'd sound stupid: no, the same laws don't apply to a wizard or a king or a hero or an angel as apply to me, how could you think such a thing?
Rather, the line is just common experience. An ordinary person can't fly. A flying person is supernatural. An ordinary person can jump, a jumping person is natural. From the point of view of an inhabitant of the fantasy world, an aircraft, even a hot-air balloon, is supernatural - maybe if the airplane would just flap its wings, it'd be natural, though (?). And a roc, a bird as big as an airplane? Perfectly natural it should fly, /it's a bird/. A person flying around would be supernatural - wizards do it all the time. A hero jumping over a castle wall, though is still a person, jumping, and people can jump, it's not unnatural, though it is extraordinary, maybe even superhuman.
The line isn't between magic and mundane or between heroic-fantasy supernatural and RL-physics 'natural.' It's between the mundane (RL reality) and the fantastic (FRPG reality). That's a clear line and there's no crossing it.

Everything in the game belongs on it's side of the line, that's the standard it needs to be held to.