this week after training I had a chance to record applications for Heian Shodan / Pinan Nidan.
According to my working theory, Pinan Nidan / Heian Shodan, as the second of the five Pinan/Heian katas, provides solutions for when we have been touched or grabbed by the enemy. It might be a lapel grab, an upper arm grab, a grab on the shoulder from behind or a clash of hands mid-fight. When we feel the touch of the enemy's hand, we know where the enemy is in relation to ourselves. The applications make use of that knowledge, when we first manipulate their elbow and then go for their head/neck.
I've postet applications for Pinan Shodan / Heian Nidan on the forum a while ago, if you are interested:
The video is intended as a memory aid for myself and my students. But it might be useful for others as well. Have a look!