The “couch gag” in the opening sequence of the October 2nd episode of The Simpsons was animated by John Kricfalusi, who is best known as the creator of The Ren & Stimpy Show.
Last October Banksy created storyboards and directed the opening of The Simpsons.
UPDATE: Cartoon Brew interviews John Kricfalusi about the intro animation.
See Also: Every Version of The Simpsons Couch Gag
via Cartoon Brew