Memorable One-Scene Characters

One scene, one single scene can be enough for a character to leave a huge impact on the viewers*, even become one of the most memorable and enjoyable aspects of the film, even earn the actor an Oscar nomination... and in some exceptional cases, a win.

So, which of these one-scene movie characters was, given the short amount of screen time AND the intensity of the performance, the most memorable?

After voting, you might discuss the list here

*some of them managed to sneak into one little scene (or two) but they hardly spoke in them and whether a scene or a 'sequence', they're all known for one moment of the film, little in time but big in the impact.