You have to strike from the waist. Stand up straight!
4 seconds sound clip from the Crippled Kung Fu Boxer movie soundboard.
You can hear this line at 00:56:19.247 in the DVD version of the movie.
Quote context
[...]
- Grandpa, you're not feeling well. If you... In case...
- I know that I'm not feeling my best at the moment, but I've lost none of my skill.
- Grandpa!
- You have to strike from the waist. Stand up straight!
- Hsiao Chun is a sick man, he won't get away from me.
- I see, what about Chin-feng?
- Relax, if my brother doesn't turn up soon, I'll deal with that punk by myself.
- Master, we don't have to worry about that guy. Why don't we enjoy ourselves?
- Yeah, come on, let's drink. Cheers.
- Teacher, if we keep this up, you're gonna kill me.
[...]