20) Fight Club (1990)
Brad Pitt plays a macho character, Tyler Durden in this all-time classic. At one point in the film, the narrator, played by Edward Norton, and Tyler Durden are involved in a brutal fight in a parking lot.
Norton says that he was told by Fischer to just tap Brad Pitt, but at the last minute, Fischer instructed him to hit Pitt in the ear. The movie shows Pitt's actual reaction to this punch and line as well: "You hit me in the ear!" were very real, because he didn't think that Norton was going to hit him.
It was certainly no surprise when true amazement from Norton emerged in Pitt's response. That made the scene more realistic and set a feeling in the movie about the raw, wild nature of their relationship. The impromptu scene became one of the standout scenes in the movie.