Twilight getting trolled by Trixie in chapter 14, followed by Miss Spelling attempting to explain what a "polymath" is to Twilight's friends:
Miss Spelling: It means that she dominates numerous subjects. Applejack: Well shoot, Ah could figure out that much, Sug, but what's goin' on behind closed doors between a Princess aní her subjects ain't no concern of mine.
In Chapter 15, Gummie Horseshoe tries to interrogate Ditzy Doo after she is sent by the Cutie Mark Crusaders to deliver a cake with a file and a blowtorch in it to Rarity. Hilarity ensues.