I coulda been a viewer . . .

My colleague Andrew Sullivan has been hosting nominations for the best movie line ever. This is the most recent:

Which makes me realize that I've probably used that line 100 times or more in conversation, even though I've never actually seen the movie. I don't know why I haven't; it's just somehow never happened. But watching the clip, I was reminded that I love Brando, I love Kazan, I love old movies, and boy, I oughta.

So I'm taking nominations: what's the best movie you've never seen?