The Shawshank Rdeption- The whole flashback thing at the end which shows just how Andy got away with all. Ties up the whole story excellently. Morgan Freeman's VO here is great.
Road to Perdition- From the moment Tom Hanks says "Just one last thing, and then it's done." to when he walks away into the night after confronting Paul Newman. The cinematography is the best I've scene and the sound is great. Silence, apart from the music, and then "I'm glad it was you." and a heap of gunfire. I love this scene, it may be my favourite of all time.
On the Waterfront- Hard to go past the whole taxi scene with Brando and his brother. "You don't understand I could have had class, I could have been a contender. I could have been somebody, instead of a bum. Which is what I am let's face it."
The Lion King- The stampede scene in which Scar kills Mufassa is good, but I really like the one where Simba meets up with Rifiki, who then leads him to his father, and Simba sees that he must take the responsibility he abandoned. Great stuff.
Forrest Gump- The film is packed with memorable scenes. Bubba's death, Forrest going for a run, or anything with Lt. Dann.
Schindler's List- When Oskar is presented with the ring by Itzhak Stern, and breaks down saying how he could have saved more. "This car, that's ten people right there." He is then forced to flee into the night, because despite his good deeds, he is a wanted man.
Dirty Harry- The whole "Do you feel lucky" scene is great, but I also love in one of the sequels when he returns to the coffee store, or when he drives a car through a window.
Jurassic Park- When the T-Rex tears down the fence and wanders across the road.
A Few Good Men- The whole "You want the truth scene" towards the end is really well written and acted.
Jaws- The opening and closing scenes.
The Usual Suspects- The end scene.
Saving Private Ryan- The scene in which Captain Miller decides to let the captured German soldier go, causing anger from Edward Burns character, leading to that great speech from Hanks. "I don't know anything about James Ryan, he means nothing to me. But if finding him so he can go home earns me the right to go home to my wife, well then, that's my mission."
Nothing to Lose- The scene is which Nick and Terrence hold up the store where the old Henry is working, and argue over the better ways to rob him. "The freeze mother f***r part was pretty scary. He then led me to believe if I moved my ass it may be blown off. You were scary too though."
Ah, so many more I can think of, but that ought to do for now.