Er, not quite. There is an actual, physical monster in Cloverfield, and unlike the no-see-em trailer, the film eventually shows it in all its gruesome glory (and no, it ain't Stay Puft). Opening Friday, J.J. Abrams' camcorder monster movie (which some describe as "Godzilla meets the Blair Witch") covers a terrible day for all of Manhattan and, in particular, for a group of New Yorkers throwing a bon voyage party for one of their......