Goodfellas: Could be any scene but I'll go with the first time Henry takes Karen to the night club through the back way
Godfather: Opening wedding sequence.
Pulp Fiction: The scene where they are cleaning up the car at Tarantino's house
Glengarry Glen Ross: Coffee is for closers scene
The Shawshank Redemption: Tarring the roof scene, followed by the bull queer getting the shit kicked out of him.