S2·E52 Faking the Grade

By some kind of miracle, Kuzco gets all A's on his report card, while Chaca gets all D's. This leads to Kuzco being put in the SD class where he immediately begins to fail miserably in all of the little games the class plays. Meanwhile, Yzma has received some new potions that flip things around giving the opposite of what is already there. However, before she can use it, the potion switches the floor and ceiling causing her and Kronk to become stuck on the ceiling.