Butters: (discussing his evil plans) We shall take over the world by causing a huge soccer riot, so that we can-
Dougie: Simpsons did it!
Butters: We shall shake up all the beer cans with a mixer machine, so that they-
Dougie: Simpsons did it! They did it in Episode 9F17, entitled "So It's Come To This...".
Butters: (miffed) Fine! Then I guess I'll forget about trying to destroy the world and just run away and join the circus!
Dougie: Simpsons did it.
(Butters yells in frustration.)