This is a special technique. It's Ninjitsu. When it's mastered, it's real hard to beat.
6 seconds sound clip from the Heroes of the East (1978) movie soundboard.
You can hear this line at 00:33:52.993 in the DVD version of the movie.
Quote context
[...]
- Also, your pole is too short. You'll lose.
- Why are you hiding? You admit you're beaten? Come out!
- Look... What are those clothes? Are they yours?
- This is a special technique. It's Ninjitsu. When it's mastered, it's real hard to beat.
- Just now, I was just playing. I mean, if I had been serious then you'd be dead now.
- If I'd have put poison in it too, then you'd have died.
- These techniques, the Chinese have them?
- Sure, but a different name. In Chinese we call it... murder.
- And with us, it's a crime. No real fighter would use it because he'd be disgraced if he did.
- You're trying to insult me, and nothing else.
- No I'm not. I tell the truth.
[...]