Grampa Simpson: Have you ever read "The Boy Who Cried Wolf"?
Bart Simpson: I glanced at it. Boy cries wolf, has a few laughs... I forget how it ends.
Grampa Simpson: [does an annoyed grunt as he approaches a red light] Bart, is that light green?
Bart Simpson: Yep!
Grampa Simpson: It better be!
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From: The Simpsons