Writer-director Todd Berger managed to create a sharply crafted character study under the microscope of a familiar social situation that quickly spirals completely out of control. Cross, for once, plays the straight man -- the outsider trying to come to grips with the emotional baggage and off-putting dynamics of this clique of brunch-eating best friends. Stiles, who's usually a supporting character, shines as the single but "together" friend who can't stand how her friends assume that she ends relationships for no good reason.
Every couple gets a turn in the spotlight, and it becomes more and more obvious that the unknown disaster taking place is radically changing everyone in the house. When the fifth couple, always late to brunch, shows up at the door, Tracy refuses to let them in, because they've already barricaded the doors, and really, they should have been more considerate about punctuality over the years. Buck and Lexi, musicians who apparently have an open marriage, take the time to make love and strum their guitar and glockenspiel. And Ferrera gives a physical comedy performance as Hedy, who uses her chemistry skills to mix up a batch of homemade Ecstasy, because if there was ever a time to get high, it's when the end of the world is nigh. For a one-set dark comedy, It's a Disaster is a surprisingly entertaining, play-like ensemble film.