You're too modest.
5 seconds sound clip from the Militant Eagle movie soundboard.
You can hear this line at 00:01:40 in the DVD version of the movie.
Quote context
[...]
- Marshal.
- You have been with me now for 3 years, but I never realized you were so expert at Kung Fu.
- I'm just a country fellow. I know nothing. You shouldn't flatter me like that.
- I've sent in an application for your promotion.
- I'm just doing my duty. I'm only a soldier, and I've been proud and happy to work with you.
[...]