Cloverfield was best known for its shaky-cam handheld amateur-documentary style. But it actually deserves more props for its ambitious and sweeping scenes of New York in flames and rubble, which appeared in the background of almost every shot. Now a "showreel" from digital effects designers Double Negative shows how a small soundstage or single-block area got "opened up." You can seewhere the actual destruction ends, and the digitally painted stuff begins. And the joins aren't as obvious as you'd expect.