Ladies and gentlemen, of all the martial arts, Chinese kung fu is by far the best. As I am sure, gentlemen, you already very well know.

17 seconds sound clip from the Mysterious Footworks of Kung Fu movie soundboard.

You can hear this line at 00:10:14.699 in the Blu-ray version of the movie.

Quote context

[...]

- Go on! Go on there, get in there! Go on!

- Come on! My teacher told me to challenge you to a fight. Come on then.

- Teacher, teacher. Teacher, uh, teacher, what do I do? Teacher!

- Teacher, I did it, Teacher, I did it! I won, I won. I won, Teacher.

- Thank you, thank you.

- Ladies and gentlemen, of all the martial arts, Chinese kung fu is by far the best. As I am sure, gentlemen, you already very well know.

- Now then... Different styles of kung fu. And these differ considerably, you see? And mine is better than his. One, two, three, four!

- Hey, Master, that guy knows his stuff.

- That's because he's more experienced.

- Not really. My teacher says a young man's better.

- Hm. So a smart-aleck, eh? Right.

[...]