The steel structure of the service station roof morphs into a jungle gym that stretches across the back of the Broad Museum and incorporates covered walkways, an escalator, and stairs. The long exterior escalator has reminded some critics of the Pompidou Center, Piano's first major building, designed with Richard Rogers. In fact, its architectural impact is much less forceful, except for the shocking red color. I think the color is Piano trying to be playful, but the effect is oddly mechanical: "If it's steel, paint it red." Moreover, the contrast between the lipstick red and the beige travertine of the museum itself is, to put it mildly, infelicitous.