Nak Beop(Falling Method) of Hapkido
The principles of Nak Beop(falling technique) are three:
The current best system of Nak Beop(falling method) seems to have been settled in Judo by Kano Jigoro, and it focuses on motions only. The (inner) principles of Nak Beop was systemized theoretically by Master Blue first, and Hapkido includes all of them.
There are three levels in principles of Nak Beop: (1) The level of Samjae, (2) formed principles, (3)training method. The foregoing three principles belong to the (1) the level of Samjae: <3> belongs to the way of Haneul: Keep everything on its own proper position in continuous change.(Ch.6 of PPT, Ch.3-1 of 3JKY) <2> belongs to the way of Tang: Have your opponent opposed to the world harmonizing yourself in it(Ch.11 of PPT, Ch.4-1 of 3JKY), and <1>to the way of Saram: Don't lose what you intend to do(Ch.5-1 of 3JKY).
In the level of formation principles, you can see Won, Bang and Gak.
Won(¡Û) is the circle. This is the form of smooth change.(Ch.6-10-1 of 3JKY) This is the core principle of falling technique of Hapkido, particularly of Rolling and falling technique, which Hapkido uses most. (See the movies <1>, <2>)