Trailers are an under-appreciated art form insofar that many times they’re seen as vehicles for showing footage, explaining films away, or showing their hand about what moviegoers can expect. Foreign, domestic, independent, big budget: I celebrate all levels of trailers and hopefully this column will satisfactorily give you a baseline of what beta wave I’m operating on, because what better way to hone your skills as a thoughtful moviegoer than by deconstructing these little pieces of advertising