Anything you need to say about linguistics (101) can be found in the Simpsons.

Fortunately, Heidi’s done the work of cataloguing all those quotes, on her blog. Now you can include witty and relevant Simpsons quotes in your linguistic work with the merest of effort. Not bad for browsing, either.

I’d like to add my favourite, though. Used in many an ESL class.

Topic: Modal ambiguity, ability v. tendency

Homer the Great, 1995, production code [2F09].

Marge: Kids can be so cruel.
Bart: [walking by] We can? Thanks, Mom!
Lisa: [from another room] Ow! Cut it out, Bart!