''The scene of him breaking down in The Sand Pebbles is a pretty unforgettable, and his back is to the camera!''---JTB
And that role did get him his Oscar nomination. But the cynic in me says we'd be seeing his face if he had true breaking-down range. Ah, well. I tend to get suspicious when things are unseen or ''heard.'' It's the Ally Sheedy MADE TO ORDER principle: when you're not convincingly crying, the audience can tell by the sound. I blame bad direction in that case.