Does Dialogue Matter

Aside from how wonderful this video is, it's also a great lesson in the often overuse of dialogue.  Not a word is spoken between these two and yet we get everything that's being said.

What would happen if you took all that dialogue in your book or scene or script and replaced it with gibberish, would you need so much character chatter?  Step back - reread.  Can you show what your character's going through by their reaction or their body language?

And once again all this makes me aware of how often I speak when I should have listened - when silence would have said so much more than words - when action was what was needed.