The Muppets: still educational after all these years. Their latest lesson: Don't be a jerk at the cineplex. Like, don't text, don't bring your banana phone (we're looking at you, Fozzie Bear) and don't bring your microwave (ahem, Swedish Chef). In a new clip for AMC Theatres, Miss Piggy loses it as her fellow Muppets indulge in bad behavior that's only slightly worse than your average humans. This promo brought to you by the letter "M" for "Manners." And by 'The Muppets,' which opens Nov. 23.