The more you repeat a sentence, even a banal one, the more memorable it gets, and you know what, the more you repeat a sentence, even a banal one, the more memorable it gets. That's how memory works, and it doesn't come as a surprise that some of the most memorable movies' lines, you know, the ones that get stuck in your head after the first watching are generally the ones that were constantly repeated, because the more you repeat a sentence and so forth.
Now, which of these memorable movies' lines repeated several times in one scene, is the most memorable?