As we may have mentioned, we are big fans of proper movie-theater etiquette. Cell phones, loud conversations with your neighbor, screaming kids at an R-rated film? Inexcusable. So it’s gratifying to learn that some of our most respected entertainers agree with us — namely, the Muppets. The Mary Sue points us to a lovely new PSA they’ve created for AMC Theatres, perhaps to make sure we all get the message before their own eponymous movie comes out November 23rd. Muppet fans, brace yourself: The clip is only 53 seconds, but it includes great bits from the Swedish Chef and Animal.