Nell Minow has settled into her seat in a Georgetown theater, her black loafers propped up on the railing in front of her, a notebook on her lap. She and about 15 other local movie reviewers are here to see "Knowing" -- a PG-13 action flick about a boozily depressed father and scientific genius, played by Nicolas Cage, who cracks a coded alien message about earth's imminent fiery destruction. At particularly cliched moments, Minow, the 57-year-old film reviewer known to hundreds of thousands of online followers and radio listeners as Movie Mom, giggles. She shakes her head and scrawls a few notes between the intermittent chuckles.