Re: Video of Seichiro Endo Shihan
This has been mentioned by others but I want to add my voice as well... this is one of the better threads I have read in quite awhile on any of the boards where I lurk.
As George said above, I have also experienced very powerful waza from a very small man when I was nineteen years old. I couldn't understand where the "powerful force" came from because I felt very little sense of force from his touch. It felt like some giant hidden from me was forcing me to do things I couldn't understand. As I experienced more, I figured out that the giant was me. I have been chasing that feeling ever since and trying to pass it on to students. It ain't magic, but it sure is "magical" at times.
The principles involved are evident in some advanced people in many arts. I have felt it from a few judoka, aikidoka, tai ji and hsing i senior folks, also, for example, Tsuneo Nishioka Sensei (of Shinto Muso Ryu) with a stick or sword has given me similar feelings of great force from very light touch with very little to no information about where it's coming from.
I agree with George that the variety is great and the training relationship is very important in keeping the long term practice viable.