For another submarine movie suggestion, I liked the bit in The Hunt for Red October, in which the sub is traveling down an undersea canyon and it needs to turn before it hits the side of the canyon. One of the officers is freaking out, saying that the captain should order a turn, but Captain Ramius (played by Sean Connery) is calm, silently counting (we can see him mouthing numbers). He orders the freaked-out officer to be relieved and then at the last possible moment, orders a turn.
That was a great scene. And Paul Dano was excellent.
Is that when he admits he cheated?
Mine is from Manon de la Source. When Yves Montand is sitting on the park bench listening to a former resident of his town gossiping. He comes to the realization of what he had done (over the course of this and the previous film) while listening to her. His face is so reflective of all that he threw away for stupid pride.
For me, the crucial scene in that movie is the one where the CPO makes his decision.
The Princess Bride: The sword fighting scene between Westley and Inigo.
I like the part where grampa tells the kid “Fuck a lot of women. I mean a lot of women.” He earned that golden man.
No, he never actually did either (cheat or admit to it), he just fucked up royally on camera.
Thanks. My sister was watching it in the other room, so I only caught bits and pieces of it.
I know right? To me that’s the single most engrossing piece of acting I’ve seen on film. It’s even better when you know the backstory as to how it was filmed.
So many great ones already mentioned.
Indeed, the entire scene, from the footsteps on the corridor floor to the final lines “One that hired you is me. You have 30 days” is just about as good as film gets. Perfectly acted and scripted, the timing and blocking are spot on, just a 7-9 minute block of how you do movies good (I may be a bit partial to that scene).
Another not mentioned is the ‘first dinosaur encounter’ in the original Jurassic Park, from the time the jeep stops and Alan Grant turns his head to Richard Attenbough saying in a hushed tone “I’ll show you” was just fantastic.
Oh, and one can’t have a thread like this without mentioning the opening of Star Wars (the original) with the planet coming into view and then the ship under attack and the Star Destroyer coming into view…and coming and coming and coming. Sets the mood of the film right at the start.
And one more. Quint’s monologue on the Indianapolis greatly impresses, but if you haven’t seen the restaurant and teenage punk scene in Secondhand Lions, well, Robert Duvall has one of the best speeches even (followed by a brawl where he takes on 4 young men…
I’m Hub McCann. I’ve fought in two World Wars and countless smaller ones on three continents. I led thousands of men into battle with everything from horses and swords to artillery and tanks. I’ve seen the headwaters of the Nile, and tribes of natives no white man had ever seen before. I’ve won and lost a dozen fortunes, KILLED MANY MEN and loved only one woman with a passion a FLEA like you could never begin to understand. That’s who I am. NOW, GO HOME, BOY!
Also Life of Brian: the haggle scene 
The original Jurassic Park is arguably one of the best movies of all time. I haven’t seen it in a while but I believe some time elapses between “I’ll show you” and the jeep convoy. But when the jeeps stop, and the first dinosaurs appear, and Grant (Sam Neill) is so speechless that he can do nothing more than put his hand on Ellie’s (Laura Dern) head and turn it around to see, that is one of the greatest moments in cinematic history!
I hate to be ‘that guy’ (ok maybe I love it), but this is the Straight Dope after all… The actual line is: ‘You’re gonna need a bigger boat’.
Good one but for me it’s the Uganda Railway traveling the plains at dusk, taking her to Nairobi.
In Appaloosa, an otherwise pretty forgettable movie, Ed Harris and Viggo Mortenson are two lawmen for hire after Jeremy Irons. They catch up with him as he’s meeting two outlaw buddies, everybody dismounts and words are exchanged, then a gunfight erupts. Ten seconds later the two outlaws are down and dead, the two lawmen are down and wounded, and Irons is escaping on a fast horse.
Mortenson says, “That went fast.” Harries: “Yeah. Everybody could shoot.”
Thanks for the reminder
The Pride of the Yankees: Gehrig’s farewell speech “today I consider myself the luckiest man on the face of this earth.” Of course his actual speech also chokes me up.
The lighting of the beacons in the Return of the King. I think this is only in the extended cuts, but the it is an amazing scene.
West Side Story: Balcony Scene singing Tonight gives me chills.
“Stand up scout your father’s passing” To Kill a Mockingbird
I’ll second this, absolutely amazing scene, and I found out only a few years ago my step-Grandfather was one of those men in the water that survived the ordeal.
Sorry, feel free to razz me for this one, but the President’s speech before the counterattack in Independence Day. It just works on me.
Not trying to derail this fascinating thread, but the part I am thinking of is after the comment “they do move in herds” where Grant says, almost reverently, “How did you do this?” and the response is “I’ll show you” You tube clip, the scene is from 0:00-2:45. (https://www.youtube.com/watch?v=4Bi0n04pm3A)
Press on, looking forward to many more memories (and some new ones).
No, that scene was in the original theatrical release.
Right, thank you, I had misremembered when that comment was made.
And yes, that YouTube link is that memorable scene, which deserves its own inline link! 
Forrest Gump. Forrest finally tracks down Jenny in her apartment. She introduces him to her son … Forrest.
Jenny: I named him after his daddy.
Forrest: He got a daddy named Forrest too?
Jenny: You’re his daddy, Forrest.
(Forrest reacts, and starts to get upset)
Jenny: Hey. Forrest, look at me. Look at me, Forrest. There’s nothing you need to do, okay? You didn’t do anything wrong. Okay? Isn’t he beautiful?
Forrest: He’s the most beautiful thing I’ve ever seen. But (gestures at himself) is, is he smart or is he…?
Jenny: He’s very smart. He’s one of the smartest in his class.
I could watch that scene a hundred times, and I would tear up every. single. time. That two- or three-minute span of film cemented Hanks as a brilliant actor to me.
In Bringing Up Baby when Cary Grant is frantically running around in a women’s fancy robe, white socks and flip-flops.
I mentioned that speech in another thread recently. It seemed as if you could compare it to the St. Crispin’s day speech in Henry V