The last few scenes in Captain Phillips (seriously, I never cry, but this had me in tears) and the end of All is Lost. I also loved Julia Louis Dreyfus' comic timing in Enough Said (i.e. But you're not funny!)

For some strange reason, my school showed us Carrie, and Night and Fog (a graphic doc about the Holocaust), when we were 13 years old. I had nightmares for a long time.