Krusty's Fun House

The clown has mice in his house. And they're very big and stupid. They come out of their holes and run wherever they want and are not afraid of anyone. They can step over the stairs of their own height, but they can't go any higher. To destroy these damned vermin, the clown goes into each room, takes a brick, puts it on the place where the mice can't pass, and the happy mice run down the new passage straight into the trap.