In the glut of fashion films these days, something you don’t see is a model dousing another with gasoline and burning her alive at the stake. It’s not very polite; frankly, it’s pretty rude. But that’s exactly what happens in this disturbing yet hauntingly beautiful video look book for Norwegian jewelry label Bjørg, designed by self-described nomad Bjørg Nordli-Mathisen. Her spring 2012 collection is called Heresy, which makes a little more sense, in an old-school witch hunt kind of way. Still, while we’ve heard of girls doing dastardly things backstage before a fashion show, this is mean girls gone medieval…