Ronald Lee Ermey (March 24, 1944 – April 15, 2018) was an American actor and Marine drill instructor. He achieved fame for his role as Gunnery Sergeant Hartman in the 1987 film Full Metal Jacket, which earned him a Golden Globe nomination for Best Supporting Actor. Ermey was also a United States Marine Corps staff sergeant and an honorary gunnery sergeant. (Wikipedia)
Glover is watchable in that what the hell is he going to do next kind of way.