The Last Crusade an energy drink binge is referenced in dialogue, but the narrator feels too ashamed of whatever happened during it to give context.
“Think of it as a memento,” Dylan said with a wink. “Though I doubt any of us could forget that weekend even if we tried.”
What he was referring to was—you know what? Never mind. Trying to describe some things with words simply doesn’t do them justice. All you need to know is that we were each grounded for three months, no charges were filed, and we made the front page of the local paper.
I facepalmed. “If I’d known my dad had that much duct tape—”
“STOP,” said a chorus of three voices.
During the epilogue of You Can Fight Fate, Luna shows up excited about a planned adventure, but Azalea refuses to let Twilight get involved because she's pregnant.
Luna: Twilight! We have been fools this entire time! "Argent Map' is an anagram for the word 'pentagram!'"
Twilight: And so the translation would be-
Twilight: Really, though? With an enchanted spatula?
Luna: It is the only rational explanation.
Twilight: Azalea, I have to-
Azalea: No adventures! No quests, no journeys, no epic undertakings. You promised me after the thing with the pearl inside of the giant fish.
Twilight: But Azaleaaaaa! But... but... enchanted spatula! We have to do something or the cultists will cross-pollinate with the mutant porcupines!
Luna: You can't blame me for what happened. I don't even know where the cultists found that much jam living inside a volcano, much less how they kept it from going bad.
Celestia: You could have warned me about the ferrets, at the very least. And then to top it all off this 'epic artifact of immense power' turns out to be—
Luna: The book didn't mention that! I don't know what the Order was thinking! I don't even know how you'd do that to a spatula! Those poor, poor quiches. Their sacrifice shall never be forgotten.