A monk came to say good bye to Ch'an master Niaowo (Bird's Nest). He said:
-Thank you, Sir, for everything you've done for me. Now I got to go.
-Where will you go?
-Any place where I can learn Buddha dharmas.
You keep saying about it and limiting it with your categories but reality isn't constrained by your concept of nonverbals either. So, you can say what you like and want to about it. What do you want to say about it? Are you slouching, hunched, or sitting up straight? Is your body language paying attention? Will it answer you back? Yes, listen and it does dodah.