This is called the Japanese Crab Technique.

10 seconds sound clip from the Heroes of the East (1978) movie soundboard.

You can hear this line at 01:34:30.059 in the DVD version of the movie.

Quote context

[...]

- Hey. I'll take you! Wait for me.

- All right.

- Come on.

- Thank you. Thank you.

- That's all part of Ninjutsu. It's a technique that specializes in illusions.

- You lie.

- Try my sword.

(SWORD FIGHT)

- One round to you. I'll wait there.

- Are you convinced we're better now? -What else?

- This is called the Japanese Crab Technique.

- Not bad.

- Chinese Crane Style.

- Teacher... we finally beat him.

- Don't kill. Just teach him a lesson.

- I'll cut his arm off.

[...]