Former FBI agent breaks down body language pet peeves

1:23 to 2:43  

Some people are pacers, you know, waiting for the baby to be born, or they're waiting for the next flight, and they are pacing back and forth.  What happens is the fluid inside our ears, as we move, those little hairs that are inside are sensitive to the movement of that fluid.  And this is why we rock a baby to sleep.  That rocking motion is then transferred as adults into walking behaviors and under stress that helps us to calm down.  One of the things that happens when we pace is that we compel the feet to touch a surface over and over again.  That in and of itself creates a form of novelty.  The gastrocnemius muscles of the legs, the calf muscles, is also known as the second heart.  When it squeezes, it's forcing blood up.  This is beneficial for thinking because now you have both the real heart and the secondary heart both working together to force that blood upward.  So there are actually some benefits to this, and a lot of creative people find themselves pacing because it contributes to that process.