[ Fortunately, the simplified explanation is enough. A couple more levels of understanding than what he's explaining is very bad. There's a neat little furrow of her brows as she takes it in; it takes effort not to look back a third ( fourth? fifth? ) time. They're getting further away, and it's getting less productive to do so.

She doesn't really have a horse in the race; figuring out the ins-and-outs of this world will not be a priority for her. But— ] ... Perhaps a deity. [ If it's to a scale that he finds unnerving. ] Or a higher being of some kind.

I can't imagine anything from my world causing ... this. Any of this. [ What a chilling thought. ]