I'm one of the few that has a copy of the Fillmore movie . Mama Cass doesnt appear in this movie . I also beleive it was Bonnie Bramlett that told the audience at the Fillmore West that Bill wouldnt let them come back for an encore . He was in his office at the time and heard her on stage and went out and told them to come back . They didnt . Say what you want about Bill Graham , I was a Winterland regular and spoke with Bill many times , and he was always nice to me  . Thanx .