R. Lee Ermey's Full Metal Jacket Contributions

In the film "Full Metal Jacket," the actor who portrayed Gunnery Sergeant Hartman, R. Lee Ermey, impressively generated 150 pages of insults for his character. Moreover, the original actor cast for the role could not maintain intense yelling for more than 30 minutes. However, when Ermey assumed the role, his boundless energy never wavered.