“and then....”

...and then you arrive at The Edge of the Universe... where it’s like a canyon, where you can fall off if not careful, the only difference is that it rounds off and sends you in another direction, so you never experience The End of it all. Well, there must be a Wall of the End of The Universe, right? Even if it is…

Let's burn did mutha fucka down pookie!

Does this mean that in some parallel universe, everything about say, the religion of Christianity, is completely accurate and factual?

Whoa whoa whoa...you have your stoner movie cosmology ALL screwed up. The "and then" drive-thru scene is from "Dude, Where's My Car?"

I'm trying to understand the concept, I am. But my mind flashes over to the Drive-Thru at Harold & Kumar whenever I try to think about it.

You seem to be suggesting something like Olber's Paradox but there are ways to arrange matter and energy over an infinite space-time so you don't have this problem.

We always have to deal with either there being a place where all existence stops, or infinity. If there are universes outside our universe, either THAT will go on infinitely, or there will be a point at which existence of some sort stops. Neither makes any rational sense.