This paper explains that, in "Taxi Driver", director Martin Scorsese uses the camera and eerie
lighting effects to underscore
his study of the alienation of Travis Bickel, the taxi driver, who can not find a way to relate to others and build a life. The author points out that Scorsese uses camera angles and
movement to create the narrative but uses the opposite, utter stillness, in scenes, which mark transitions. The paper relates that one of the most famous pivotal scenes in film shows the protagonist Travis acting with an imaginary adversary while looking in the mirror.