Part performance art, part trendy food blog, the strange Instagram sensation @breadfaceblog is absurdly, succinctly, and exactly on the nose of what its handle suggests: a person planting her face—sometimes violently thrashing, other times prodding or rubbing, in a gentle caress—upon a variety of carb-laden goods of all kinds and cultures, from croissants to ciabattas to baos, obliterating each to crumbs.