School of Rock - S1.E2

At the Canterlot Natural History Museum, Maud Pie gives a boring lecture about rocks. As the museum patrons become bored to tears, Pinkie Pie, Rarity, and Twilight Sparkle use their geode powers to give the lecture some pizzazz. At the lecture's conclusion, the patrons cheer with excitement, and a young girl in Maud's fan club asks for her autograph.