Tomball Demonstration Team shows the north-south line of Jindo Hyung and the East-West line of Nah Han Ji Hyung. Also included are examples of techniques from the hyung as used for self-defense. 2017
Chuck Holland 2014 Ko Dan Ja O Dan candidate evaluation video 2/2. Staying relaxed in upper body during Soo Gi exercise. More consistent connection of breath with physical movement.
2014 Ko Dan Ja Shim Sa Teaching Video.
Theme: Shin Chook
Focus: Creating power for offensive and defensive techniques
Core content: Use of breath to create tension