Techniques - Inverted Knife Hand Strike (SONNAL BAKKAT CHIGI)

This is the inverted knife hand strike in Koryo. Although an Inverted Knife Hand Strike can be at any height, here it is taught as a strike is to the neck as performed in Koryo.
Specific requirements can be found on page 68 of the Beyond Sports Taekwondo Poomsae Handbook (5th Edition).

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Thanks

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#didit

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My master has a board break using that ma’am do you have a video showing that