I am very interested in the forms of biologically engineered movement. The formation of wings, the muscles which move them and the coordination needed to maintain a life sustaining movement such as flight or moving away from a predator at high speed is fascinating to me.

The act of bipedal movement has been referred to as a "form of controlled falling" and this can be seen in the photographs of Edward Muybridge. Look at how the torso leans forward into the movement and then is 'caught' by the outstretched leg.

Comparing the movement between the running man and fighting birds, there is such a natural fluidity in the bird's movement. The Bird doesn't have to be taught how to move, but the man must train for extended periods of time to perfect his running ability.

I believe we humans observe the animal kingdom and learn from their natural abilities to enhance our own movements.