Cracked staged one of their "photoplasty" contests with the premise of changing a movie's tagline to make the poster more honest and informative about the film. I didn't understand any of them until I saw posters for movies I'd actually seen, and they are funny. That made it abundantly clear how tragically uninformative movie promotions can be. (Well, The Fate of the Furious was funny either way.)
I don't think there's a lot of spoilers here, at least none that make any difference. Check out all 42 entries at Cracked. You'll laugh at the ones you understand, and maybe you'll become curious about what actually happened in those movies you haven't seen.