A sign reads: “old 21st centry.”
Max: Aha, “old 21st century,” with obligatory spelling error.
Alfred: The last period we know much about from before the event. They stopped putting everything on those shiny disks afterwards. It was hard to fix the machines that play them, but some of our smartest people could do it.

We see Steve facepalming while Alfred does his explanation.
Heidi: Look… Mythbusters, Futurama.
Alfred: Truly strange documentaries. People had weird ideas back then. But, we managed to build many of them, because we believe those people surely were very smart.

Heidi: They must have studied those things in detail, down to the melon baller from that Futurama movie.
Adil: It is thanks to a goofy animated series that my eyes nearly got scooped out?
Max: I'm sure Matt Groening would deeply appreciate the irony in that.