Pinan Sandan, the third of the Pinans. It's basically overflow locking techniques which wouldn't fit into pinan shodan. Plus the bear hug escape method.
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Kata applications
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Pinan Sandan 1
Turn left 90° into nekoashi-dachi or kokutsu-dachi (in the Heian variation) and execute uchi-ude-uke to the left using your left arm and leg forward.
Step forward your feet together into heisoku-dach and execute a double "block", left arm downwards and right arm upwards. It's important to get the left arm within the right as they pass one another.
Remain in heisoku-dach and execute another double "block", left arm upwards and right arm downwards. It's important this time for left arm outside the right as they pass.
Turn right 180° into nekoashi-dachi or kokutsu-dachi (in the Heian variation) and execute uchi-ude-uke to the right using your right arm and leg forward.
Step forward your feet together into heisoku-dach and execute a double "block", right arm downwards and left arm upwards. It's important to get the left arm within the right as they pass one another.
Remain in heisoku-dach and execute another double "block", right arm upwards and left arm downwards. It's important this time for the right arm to be outside the left as they pass.
Turn left 90° into nekoashi-dachi or kokutsu-dachi (in the Heian variation) and execute uchi-ude-uke to the left using your left arm and leg forward. The Heian variation makes use of morote-uke rather than uchi-uke.
Continue the anti-clockwise rotation another 90° into shiko-dachi or kiba-dachi in the Heian variant. Strike out to the left horizontally with tettsui-uchi (hammer fist). The right arm nukite should be fully behind your back level with the ground.
Rotate anti-clockwise another 90° and step forward into zenkutsu-dachi with right leg forward and execute oi-tsuki strongly, bringing your arm from behind your back to the front.
Bring your rear left leg up to your right and rotate 180° anti-clockwise, into heisoku-dachi place your arms by your side. When rotated, bring your fists to your hips and push elbows out.
Step forward rotating 90° anti-clockwise into shiko-dachi or kiba-dachi. Swing your shoulders anti-clockwise and block with empi-uke with your right arm.
Step forward rotating 180° anti-clockwise into shiko-dachi or kiba-dachi. Swing your shoulders anti-clockwise and block with empi-uke with your right arm.
There are different variants of this movement. The uraken-uchi transitions into a shuto sakotsu-uchikomi in the heian and some pinan versions pushing out to the left. The left hand is brought back to the hip with hikite. Some pinan versions rotate to the right and block with uchi-uke instead.
Punch with your left hand over your right shoulder in hachiji-dachi (kiba-dachi in the heian variant) and pull your right hand to the right hip with hikite.