Mayor Quimby: Chief Wiggum, Archbishop McGee, distinguished guests, I am pleased to dedicate this emergency warning system. In the off-chance of a nuclear disaster, this sign will tell you, the good citizens of Springfield what to do.
Warning sign: [RELAX. EVERYTHING IS FINE.]
Warning sign: [MINOR RADIATION LEAK. ROLL UP WINDOWS.]
Warning sign: [MELTDOWN. FLEE CITY.]
Warning sign: [CORE EXPLOSION. REPENT SINS.]
Audience is in stunned silence over gravity of such a warning; all except for Carl, Homer, and Lenny, who are snickering because they think that warning sign is ridiculous
Homer: Joke's on them. If the core explodes, there won't be any power to light that sign!