Skinner's Sense of Snow
The Simpson family go to a circus show called Cirque de Purée (a parody of Cirque du Soleil). However, a blizzard makes the circus have to stop. All of the schools (except the one Bart and Lisa go to) close because of the blizzard. Only some of the students go to the school during the blizzard. Seymour Skinner and Groundskeeper Willie are the only people in the school's faculty that came. Skinner puts a DVD in a movie projector. When the DVD gets set on fire, the school day ends. However, the blizzard causes snow to pile in front of the doors. Nobody in the school is able to leave now.