Sad shapes.

-Via Cognitive Daily-
You know, I'm not quite sure what to make of this.
"If you're like most people, the shapes that appear to be less stable ... are also more fearful. Those that are rotated more from the vertical position ... are more suffering and less angry."
I could understand certain shaps making us nervous since they could imply danger in some way - i.e. sharp or unstable objects. But what about the other emotions? Do they approximate some sort of body or face expressions? I suppose I should really read the original article.