Ever practice any oriental marshal art. I briefly studied Tai Chi when I was 23.. Taught by an elderly Chinese teacher.
One day at a public demonstration as an introduction. He choose me as a subject. I had returned from a cross country bicycle trip. Learned some judo in San Francisco. Looked like I had just finished Marine boot camp. Was in excellent physical shape. He probably picked me for those reasons.
He demonstrated "pushing hands"
He quickly learned my balance point. I immediately understood what he was doing. Before I could determine his balance poinnt, and with only his fingertips pushed me off balance, sending me across the floor A small amount of force at the correct point, was just enough to unbalance me.
Using an opponents own momentum
The principle of l
ess is more in the oriental martial arts