What's the worst fashion trend you've ever seen? Time magazine recently asked this question of the enduringly decanal Tim Gunn, now mentoring a fresh crop of designers on the fifth season of Project Runway. Gunn's pick of sartorial tragedies? The embrace of rubbery shoes fit for an ungulate.

Generally speaking, it's footwear trends. I mean, today, the era of the Croc—it looks like a plastic hoof. How can you take that seriously? I know it's comfortable; I understand that. But if you want to dress to feel as though you never got out of bed, don't get out of bed.