Sometime during the genesis of Gareth Pugh's latest collection, The Wizard of Oz bumped into Predator. The result was the kind of showy fashion farrago that has been a London staple since…oh, at least since Stonehenge was built. Coco Rocha marched out in a samurai dress made from zippers, and we were off. The zipper peplum, the zipper panniers, and the huge zipper shoulder pads were exploded components of what might almost have been a Joan Crawford costume, if she'd ever gotten to play the Predator Queen of Outer Space. Those famously exaggerated Crawford shoulders could also be inferred from a hooded gray flannel cape, or in-furred from the huge, shaggy goat-hair "epaulets" on a wrapped coat