Raul Rodrigo wrote:
At the higher level, a kneeling tori can absorb a shove to the chest by a lunging uke and just....bounce him away.
Raul, I would hesitate to say that this is a "high level" skill, BUT there are varying degrees to which people can start to develop and utilize this ability, because it is based on base level skills.
FWIW, one of my ex-students who had been training with me for a year and a half, admittedly only intermittently and at most twice a week, was able to do this to some degree. On a much larger and heavier uke, it requires far more skill...
The point is, the basic concept is simple to teach and once you understand the basic concept it's not hard - but it requires A LOT of practice.