Bart+Lisa: Aah! Sideshow Bob!
Bart: _You_ wrote me those letters.
Marge: You awful man! Stay away from my son.
Bob: Oh, I'll stay away from your son, all right. [evilly] Stay
Homer: [quaking] No!
Bob: Wait a minute, that's no good.
[Starts to walk away, then runs back]
Wait! I've got a good one now. Marge, say, "Stay away from
my son," again.
Marge: [angrily] No!
Bob: [groaning] Oh...
-- I hate it when that happens, "Cape Feare"