> A deck only has 52 cards, but you shuffle it properly, it's essentially guaranteed that nobody in human history has ended up with the same order as you just did.

That fact still messes me up every time! Like, I know very well that 52! is a ridiculously huge number. And still, it feels like "but it's just 52 cards, give me an afternoon and I'll do it, how many combinations can there be?"...