- Who are you?
- All right, I might as well tell you. I'm a government agent.

9 seconds sound clip from the Kung Fu from Beyond the Grave movie soundboard.

You can hear this line at 00:43:44 in the DVD version of the movie.

Quote context

[...]

- You were running real fast. I could hardly catch you up.

- I wondered who it was.

- Hey, this is Uncle Chung.

- How are you?

- Where's my book?

- What book? What are you on about?

- Huh? Give it back to me!

- Hey, stop fighting, stop fighting.

- Who are you?

- All right, I might as well tell you. I'm a government agent.

- I'm here to investigate the murders.

- Convinced now?

- All right, it's my turn for questions. Tell me, what is your purpose in being here?

- There are two reasons. First, I came to seek revenge. Second, to find my father's bones.

[...]