[ Actually, Ted read enough sci-fi in his youth that he's not completely unfamiliar with the concept of multiverses.

They're just, you know, not a thing. Not a real thing. Or - maybe they are, heck if he knows, but he's certain nobody's ever found one -

Or maybe they have. And they couldn't come back to tell everyone about it.

Ted runs a hand through his hair. ]

I think you're underestimatin' the adjustment I'm gonna need. My Earth doesn't have any of... what you just said. Mind control. Monsters. Superheroes. [ He's counting off on his fingers. ] We've just got your standard flora and fauna.