Now that you mention this, I have heard of this before, cant remember where. It said that people look DOWN when they feel hopeless, sad, or as we would say are going upstream.
They said to look UP into the sky several times during the day, as looking UP means HOPE or as we would say it is a downstream thing to do.
It really does make you feel better or good - or gets you moving up the scale you could probably say - immediately!