adywan said:

Listening to the archival interviews commentary track for ROTJ it is pretty funny what George Lucas says about the scene where Vader pick up the Emperor now that he has added Vader's Nooooooo's:

Acting with masks is a very ancient tradition. It's the emotion of the story that can carry you through and the nature of cinema that you can switch shots you put on either side of the mask that tell you what the mask is thinking.

So younger George knew that the audience didn't need to hear what he was thinking to understand the scene. I'm really surprised that this comment made it onto the Blu-Ray, unless adding the No's was a last minute decision when everything else was finished.

Sounds like Lucas completely misunderstood Japanese Noh Theatre. That's just what it's called, George, they don't actually have to *say* it.