Harlan Ellison has a great essay titled "The Three Most Important Things In Life", being work, sex, and violence. The Work portion recalls his one day working for Disney, where he was fired halfway through the day for doing a loud, impromptu Disney porn skit in the cafeteria, and Sex is about picking up his date at her immaculate house and discovering she was a sexual masochist.
The Violence part of the essay recounts an incident in a seedy Times Square theater, when he and a friend were in the balcony watching Jack Lemmon's Save the Tiger. An inconsiderate, possibly drunk, man (also in the balcony) starts calling out in the theater looking for his friend Leroy; after yelling for a minute or so a deep and menacing voice from the rear of the balcony rumbles "If you don't shut up I'm going to kill you." The rude guy ignores him and continues to call for Leroy. Harlan wrote that a massive shape came from the back of the balcony, picked up the Leroy-searcher and pitched him headfirst over the balcony, then silently left the theater.