True, False, or Legend?

Calling all Classical Club readers! For a secret project (I'm a multitasker, don't judge me) I'd like all of you to tell me about your favorite urban legend [n. a story passed down for years reported to be true which takes place in modern setting and is usually said to have happened to an FOAF (friend of a friend: My grandmother's third cousin's bingo-partner's daughter's niece's cousin's BFF's aunt)] in the Comments below! Do it! Do it! (if you wanna see it on the big screen) Remember: some urban legends are true, and you can use them!