I owe the discovery of this clip from The Simpsons to Shakespeare Geek (here, more specifically), who keeps an interesting and prolific blog on practically everything Shakespearean.
The clip itself is tremendously broad in its range of parody: it hits pedantic Shakespeareans, evil villains, Windows-based laptops, and Wikipedia, to name but a few:
Sideshow Bob: Let's not tarry. As Shakespeare said, "If it were done when 'tis done, then 'twere best it were done quickly." Power on! [Laughs maniacally.] This time I've made no mistakes.
Lisa: Actually, you made one. What Shakespeare really said was "'twere well it were done quickly."
Sideshow Bob: Yes, I'm sure you've studied the Immortal Bard extensively under your "Miss Hoover."
Lisa: Macbeth: Act one, scene seven. Look it up.
Sideshow Bob [re-entering]: I shall! [Pause.] Come on, Wikipedia! Load, you unwieldy behemoth! [the laptop explodes] Oh, dear. Sideshow Bob: Hoist on his own petard.
Lisa: It's "hoist with his own petard."
Sideshow Bob: Oh, get a life.
Links: The Episode at Wikipedia.