Many notable directors made Vietnam movies. Francis Ford Coppola almost killed himself making “Apocalypse Now.” Oliver Stone won Best Picture for “Platoon.” Stanley Kubrick naturally tried his hand at capturing Vietnam on the screen as well with “Full Metal Jacket.” The director brought his notorious meticulousness and seemingly grim view on humanity to the proceedings in creating a harsh, yet cinematic, vision of the war. These are 20 facts about “Full Metal Jacket” you might not know.