Movie Rule #3891: Luck exists.
You ever notice that in movies or TV shows, luck is a fact of life? Like there's usually an episode in a sitcom where a character is cursed with bad luck and they declare they don't believe in luck, and spend the rest of the episode inflicted with inexplicable problems until they give in. Then there's movies like Just My Luck where the whole movie revolves around luck. Where was the last movie or TV show where a character breaks a mirror or gets cursed by a gypsy, declares "Ah, there's no such thing as luck," and spends the rest of the time watching TV or getting a good night's sleep? I'd like to see that.