In no particular order, here are a few:
Disciplinary Hearing in Scent of a Woman;
Baptismal Murders in Godfather;
Fredo and Michael Confrontation in Godfather Part 2;
Batts and Tommy Confrontation in Goodfellas;
Do I amuse you confrontation between Tommy and Henry in Goodfellas;
Final battle in Platoon;
Nicholson's You can't handle the truth in A Few Good Men;
Vincent Gambini's Cross-examinations in My Cousin Vinny;
Dropped cigarette in car in Planes, Trains, and Automobiles;
TurboLax spiked coffee / toilet in Dumb and Dumber;
Johnny Cash Prison concert in Walk the Line;
The Graduate (the entire Movie): but especially, the church scene when Ben calls out for Elaine, and she responds (actually shot in Pomona area: Bonita): literally sends chills up my spine.
Also
the Graduate: when Mr. Robinson confronts Benjamin, and Ben tells him that he / his wife were only "shaking hands".
"That doesn't speak well of my wife ...and forgive me if I don't shake your hand".
Inherit the Wind: when Darrow is cross examining Brady on whether sponges think. " Do you think a sponge thinks? Do you think about the things you think about?"
Dr. Strangelove: When the German Nazi Scientist keeps having to restrain his arm from giving a Nazi salute...while he's talking about the Mine Shaft Gap!
National Lampoon's Animal House: The whole movie...but the scene where the Delta's land in a black bar, and their dates (one of whom was studying Anthropology) while the Jewish kid is drunk and imitating Otis ("he loves us")….who doesn't have a clue who the f this guy is.
Vacation: When Chevy and family are on the farm with his brother in law (Randy Quaid): "Real Catsup Earl"? "Nothing but the best for my brother in law".
Eraserhead : when Henry is invited over to his girlfriend's house for dinner, and her mother puts the moves on Henry. Also when her father is trying to carve the moving blood spurting chicken!
MO