A wonderful and quite emotional scene in Akira Kurosawa's 'Ikiru' (1952) shows the main character, Watanabe, out on the town in a bar, getting drunk in an attempt to feel life before it is ended by the disease he knows he carries. The pianist asks for any requests and Watanabe requests an old twenties love song, in sharp contrast to the boogie-woogie that has been playing. At the sound of the beautiful melody young couples joyfully get up to dance. But they stop cold, one by one, when they hear Watanabe singing the words... "Life is so short, fall in love dear maiden, while your lips are still red, before you can no longer love, for there will be no tomorrow...", as if he was alone in the world, tears falling from his eyes.
It's one of those magic moments on film that hits you totally. The atmosphere is snapped back when Watanabe's companion for the night jumps up saying "That's the spirit!", turning emotional awe into a laugh.