Liv In Cinema on Instagram: "The ending of "Primal Fear" delivers one of the most shocking twists in courtroom thriller history. Throughout the film, we are led to believe that Aaron Stampler, a shy and stuttering altar boy accused of mud*ing an archbishop, suffers from dissociative identity disorder. His supposed alternate personality named Roy is aggressive, and seemingly responsible for the brutal crime Martin Vail, a confident and somewhat egotistical defense attorney, takes on Aaron's case