what happens at the end of full metal jacket
Full Metal Jacket Animal Mother assumes command of the squad and leads an attack on the sniper. Joker discovers the sniper, a teenaged girl, and attempts to shoot her, but his rifle jams and alerts her to his presence. Rafterman shoots the sniper, mortally wounding her. As the squad converges, the sniper begs for death, prompting an argument about whether or not to kill her. Animal Mother decides to allow a mercy killing only if Joker performs it. After some hesitation, Joker shoots her. The Marines congratulate him on his kill as Joker stares into the distance, displaying the thousand-yard stare. The Marines march toward their camp, singing the "Mickey Mouse March". Joker states that despite being "in a world of shit", he is glad to be alive and no longer afraid.