Sin Moo Hapkido is a style that uses every possible combat distance, as well as defensive techniques with traditional weapons. The ability and skillfulness of the Sin Moo to neutralize any aggression by means of a hold is stated in its symbolysm (an eagle catching an arrow). The Sin Moo Hapkido techniques are based in three basic principles: Won, or the principle of the circle, Yu, or the principle of water and Wha or the harmony of the techniques. In this work, Master Balbastre les us into the forms and techniques of this unique fighting style, which includes blows (Chighi), dislocations (Kokki), projections (Donchighi) and kicks (Jol Sul).