Not the best movie, just the scene.
Mine would have to be the Denis Hopper / Christopher Walken scene from True Romance
Spoilers about the scene and movie ahead.
The acting and music are superb. The reasoning behind the scene is excellent. Hopper knowing he’s going to be tortured into telling the whereabouts of his son decides to go out with a bang. He asks for a cigarette (he gave them up but now it doesn’t matter) and gives the famous spawned by niggers speech. I love this scene and would like to nominate it for best ever.
Now I ask you. Am I lying