There is a whole body language and different way of communicating among our coffee pickers.

They use their mouths where we use hands and where we use mouths they use hands.  Let me explain:

A Ngobe  signals with their mouth.  They make a big pouting expression as if to blow you a kiss then make a head gesture.  The first time you see the pout, a Westerner would assume they are being indecently propositioned, but it is not so.

A big pout followed by a right movement of the head means - over there to the right.  A big pout followed by a shake of the head means, No more.  And these gestures are many and not intuitive.  

There is no shouting that I have ever heard.  There is a very loud sound, a yodeling call.  Something between a fog horn and a bird call that is used to alert 'the tribe'.  On the coffee farm, it usually means 'the chief' (me) is coming'.   

If there is a disagreement, a serious conflict, it is not argued, it is fought with bare hands.   They use knives and it is ugly and violent.  It is a Ngobe thing, the rest of us are never involved.

So, when we use hands they use their mouth and vica versa.......this world is a wonderful and strange thing.