^ There are actually two versions of that scene, one which replaced "ass" with "butt". Personally, I think the "ass" version is funnier and drives the point home better.
Sideshow Bob's Last Gleaming
Wiggum: Where's the guy that eats people's faces?
Guy: I'm right here, chief!
Wiggum: Oh. Then where's Sideshow Bob?
Guy 2: Uh, he ran off.
Wiggum: Oh GREAT. Well, if anyone asks, I beat him to death, okay?
^ So in order to avoid looking incompetent, he would rather look like a power abuser. Worst cop ever.
Jaws Wired Shut
(a word jumble, "MOT HANKS", appears on the theater screen)
Lisa: These are so easy. It's obviously Tom Hanks.
(the word is unscrambled and isn't Tom Hanks, but Otm Shank)
Apu: Otm Shank. He is India's answer to Brian Dennehy.