[b-] Bart Simpson is in the [4] bathroom of the [-a] auditorium where he is building a 壩 dam. He stacks a bunch of 月 moons on the tile and packs them with 土 soil then covers them with a huge sheet of 革 leather making a 壩 dam. Then Bart pulls the fire alarm, making 雨 rain fall all over the bathroom tile, getting the bathroom attendants wet and flooding the room. Bart stands atop of his 壩 dam as he laughs at everyone else getting soaked from the 雨 rain during intermission in the bathroom.