On tonight’s episode of Runway, the designers are ushered into a movie theater, where they’re asked to concoct runway looks from “unconventional materials.” Here’s hoping: a flapper dress made of Twizzlers? (Okay, so we actually saw one of those, pictured, back in Season 8. I’ve never forgotten it.) A mod pop-art black-and-white blazer with buttons made of Junior Mints? And what about a long popcorn boa, held together with corn syrup? Hey – a man can dream. Especially one who’s on a diet…