For the film "Full Metal Jacket", Kubrick had initially hired another actor to play the part of DI Hartman. However, R. Lee Ermey, who had been hired as a consultant for the Marine Corps boot camp portion of the film, performed a demonstration on videotape in which he yelled obscene insults and abuse for 15 minutes without stopping, repeating himself or even flinching - despite being continuously pelted with tennis balls and oranges. Stanley Kubrick was so impressed that he cast Ermey as DI Hartman.