At the opening night of the True/False Film Festival in Columbia, Missouri last night, Ward Serrill, director of "The Heart of the Game," introduces a rousing screening of his documentary about women's basketball at a Seattle high school. The film was a major hit with the 1,200 people who saw it at the Missouri Theater, winning a standing ovation from the full house at the end of the showing. Serrill beaming with pride on stage quipped that "this is the smallest town, the biggest theater and the most raucous audience" he has screened for.