55: Yul-Gok twin block

Source: Fortitude Training Online

Have another color belt pattern application. In this post I'll cover the last third or so of Yul-Gok. 

 We will start with a the twin block followed by the spearhand strike. One can apply these two moves as an arm entanglement lock. The supporting hand pulls in the opponent's elbow while the "spearhand" pushes out their forearm.

Iain Abernethy applying the twin block as setting up an armlock. Images taken from The Basics of Bunkai Part 6

For another example, see this video. The intent is to take the opponent all the way to the floor.

The next two sets in the pattern we use if this lock fails. If the opponent does not fall to the ground (perhaps they overpower you), one thing we can try is to just grab the back of their shirt and pull them out and to the left. Follow with the reverse punch to the jaw.

The second way to counter this lock is walking backwards so you can't be thrown. In this case, the form instructs us to follow the opponent by leaping fowards into a backfist strike, striking the side of their neck.

From this position, we use the turn into the double forearm block as a throw. This could be a simple arm pull, a shoulder throw, or a head-and-arm throw depending on your preference.

Backfist strike followed by the spin into the double forearm block as a throw. Source for gif: Kata for Self-Defense Shotoryu Goshinjutsu