A collection of short documentaries, including "Utopia, Part 3: The World's Largest Shopping Mall," about the 7-million-square-foot South China Mall, which was built in 2005 and is virtually empty; "Nutkin's Last Stand," about the attempt of Britons to save their red squirrels from an influx of North American gray squirrels; "34x25x36," about the Patina V mannequin factory near L.A.; and "City of Cranes," which explores the world of crane operators