Primal Fear
In the final act of Primal Fear, the young and stuttering 19-year-old Aaron (Edward Norton) is not found guilty, but a gut-wrenching twist reveals that Aaron faked his alternate personality and his speech impediment. Even his defense attorney, Martin Vail (Richard Gere), fell for the deception, which left him shaken to the core. When Vail asked if there was ever a "Roy," Aaron replies that "there was never an 'Aaron.'"