From a clinic with John Kerker in 2008 in Chicopee at Clarence Whitley’s school.

Some of these videos do not have sound. 

Nihanchi Opening PA913001  

https://www.youtube.com/watch?v=ilCArmSL65U  

Opponent right foot forward with a right punch (to your front)

LFF left open hand parry block across their inner elbow from the outside.

Left hand circles down and behind their upper arm, keeping the open palm up to rotate their shoulder over exposing their front shoulder point

You strike to their shoulder point (pain) with a punch and then an elbow. The punching right hand rises above the arm (not across it for a cleaner elbow strike.

Right forearm strike behind their neck, then roll their neck in clockwise as you their neck/head into stack both hands.

Conclude with right hammer fist to their chest.