I had a profound weekend seminar with Guru Stevan Plinck who is known to be one of the most talented, dedicated and intelligent masters of Indonesian Sera. You might be more familiar with Silat (a closely related style that he also trained in, I'm not too versed in the various Indonesian martial arts...) One very profound thing he talked about was how the old forms are the truest, they have the most knowledge to convey if you have the patience and dedication to them. One bit of evidence he cited was ancient depictions of warriors: relief carvings, sculptures, ceramics etc This struck a deep cord in me since I'd studied sculpture in college and found myself to be a horrid contemporary artist but very interested in the very thing that Mr Plinck was discussing: the ancients had less knowledge but they accomplished much with that knowledge, things we're still trying to discern understand even with our contemporary science and etc (no, I'm not talking about crystals pyramids flying to Mars and that stuff)....To wit, here is a Cambodian carving that depicts stable squat posture, external rotation of the arms/shoulders/upper-carriage and just a beautiful solidity.

Here's another with a Khmer warrior showing how he stays on his back leg to maintain strong drive. Notice how his driving leg is internally rotated? while his lead leg is externally rotated? Spiraling out from the hips to create a strong, mobile frame to project power in the cleanest manner possible. Down power+stride.

Any of my regular guys will be very familiar with the baseball analogies I like to make. Notice how staying heavy on the back foot, for as long as you can manage, increases the power phase? (well, I do) Also, Ken is so smooth it kind of breaks my heart that he A. played for the Mariners B. was injured so often cause he was easily one of the greatest. especially awesome is how Koga will just stay with Seoi nage, look at how :50 in he backsteps into his uke and then drives off that leg. Terrific stuff from a legend.