Complement of yin and yang

http://www.youtube.com/watch?v=Hu8rAB1RaN8

I'm too tired to write my own ponderings (rough week), so I leave you with a video clip from Falling Leaves Kung Fu to ponder.  The solo training teaches you to unify yourself and understand the harmony of yin and yang in your own body.  When it comes to harmonizing with an external force, the understanding of the cycle of yin and yang becomes refined to the point of contact.