Now kick hard and swiftly. Use your waist.

5 seconds sound clip from the Crippled Avengers (1978) movie soundboard.

You can hear this line at 00:36:37 in the Blu-ray version of the movie.

Quote context

[...]

- You're stone deaf, and so I'm going to draw on his palm, so I can convey my ideas. You use the same method when you want to talk to him.

- To stop him pushing, just kick him.

- We owe him a favor, though.

- Never mind. Although he's weak-minded now he still knows kung fu, so you can't really hurt him.

- Right, push me.

- Now kick hard and swiftly. Use your waist.

- You're doing real well. You're learning quite fast.

- I will start work on your limbs to try to make you react faster. You will need that in the event of a sudden attack. Come.

(METAL CLINKING)

- You're not really blind. You're faking.

[...]