You Talkin' to Me? (1976)
The catchphrase "You talkin' to me?" has become a pop culture mainstay. In 2005, it was ranked number 10 on the American Film Institute's AFI's 100 Years... 100 Movie Quotes. In the corresponding scene, Bickle is looking into a mirror at himself, imagining a confrontation that would give him a chance to draw his gun.