Odd Gender Differences Found in Walking
http://www.livescience.com/culture/080908-gender-walk.html9/8/2008
"If you look at someone with just their joints illuminated when they
aren't moving, it's difficult to tell what it is you are looking at.
But as soon as they move, instantaneously, you can tell that it's a
person and perceive their nature," van der Zwan said. "You can tell if
it's a boy or a girl, young or old, angry or happy. You can discern
all these qualities about their state, affect, and actions with no
cues at all about what they look like — with no form at all, just
motion."