Gunnery Sergeant Hartman is the drill instructor played by R. Lee Ermey in Stanley Kubrick's 1987 film Full Metal Jacket. Ermey had served as a real United States Marine Corps drill instructor, and his improvised insults during the boot camp sequences became the film's most quoted section. Clips of Hartman later circulated widely on video sharing and soundboard sites, detached from the plot and reused as a shorthand for extreme discipline. The performance remains popular because the delivery is instantly recognisable and can be applied to almost any failure or disobedience.