Guys.
Guys.You've not mentioned the best thing about this episode—the most meta line of dialogue in the entire show to date:

"Just because the attendees are young doesn't mean they don't deserve my best creative work."

...Okay, I lie, the best thing about the episode is far-and-away the final minute with Twilight. That's the best freaking Tara voice acting I've heard since, like, Season 1.

Never, ever, EVER ever EVER everEVER
EVER take another book out of the library at the castle without asking!
And the way she keeps
glaring at Spike as she walks up the stairs is amazingly funny. That's the kind of ridiculously subtle, superhumanly perceptive animation that makes this show what it is, right up there with the highest-shelf feature animation. It's never going to not amaze me that such a thing exists in a cheapo TV cartoon.
Speaking of glaring over-the-shoulder looks, the puppeteer's puppets googling their eyes menacingly at Rarity like they're flipping her off
oh my god 