Owen Gleiberman Chief Film Critic A school shooting is such a cataclysmic event that any attempt to dramatize the aftermath of one is, by definition, a film to take seriously. That said, there’s a right way to make one of these. “Mass,” the 2021 Sundance drama in which four parents gathered in a church antechamber for a painfully cathartic encounter session (two of them were the parents of a victim; two were the parents of the shooter), was a movie that walked a delicate tightrope.