Lisa the Iconoclast/Gags

Couch gag

 * The screen is split into a 3-by-3 grid of squares, as in the opening to The Brady Bunch, with the living room in the center square, and the five family members, plus Grampa, Santa's Little Helper, and Snowball II each occupying an outer square; they all run out of their individual squares and sit on the couch in the center square, except Grampa who remains asleep in his square.