Yep, people get paid to research this kind of awesome stuff.
A group from Cornell gathered important lines from over a thousand movies and asked people who hadn’t seen them to judge whether they were memorable, using some random dialogue as a control.
Sure enough, the quotes that stick in our heads have common features. SImple ideas are expressed in simple ways, but they use odd combinations of words.
Some memorable lines may be just chance, but they also found that memorable ad slogans used the same tricks. There is a science behind getting a line stuck in your head.
Wanna try it for yourself? You can take their movie quote quiz here.