Mr. Davis demonstrates Eui-Am and Choong-Jang. Unfortunately, I neglected to set the camera to record his excellent 4 board back kick break.
Choong-Jang has 52 movements. Note that there is very little symmetry in this pattern, making it very difficult to learn and even harder to master
Mr. Davis and Mr. Goodrich Sparring:
4 boards with a back kick:
