“You talking to me?" - Travis Bickle
Taxi Driver was a pretty intense film, especially being told from the perspective of the main character, Travis Bickle. The scene that this line derives from shows Bickle somewhere between the introvert that he is at the beginning of the movie and the near maniacal vigilante he becomes toward the end. This scene was also interesting for the fact that it was completely improvised by Robert De Niro.