But the one example that started off this whole thread, and apparently bothers way more people than I ever realized (to be honest, I never noticed this phenomenon) is how no one ever says "Goodbye" when they're ending a phone call in a movie. Or on "Mad Men," as one commenter on YouTube helpfully points out during a new supercut of this cinematic peculiarity.
I don't know, maybe I've never noticed it because most of my calls end with the phrase "Get out of there!" followed by a giant explosion.
Drew Grant is a staff writer for Salon. Follow her on Twitter at @videodrew.