- The American Indian, as always, walks into something that does not concern him.
- That's an old American custom.

7 seconds sound clip from the Gilda (1946) movie soundboard.

You can hear this line at 01:01:49.078 in the Blu-ray version of the movie.

Quote context

[...]

- He's not here. No one is here, you see.

- Maybe we should have had that 'Private' sign on the stairway printed in German too.

- Or maybe you can't speak Spanish. But I assure you, it does say 'Private.' -That's right.

- We intend to see Mr. Mundson. He's been avoiding us.

- Didn't you hear? Mr. Mundson is allergic to messenger boys.

- The American Indian, as always, walks into something that does not concern him.

- That's an old American custom.

- Mr. Mundson is having an invited party tonight. You are uninvited.

- Tell the old man to go away.

- No. You go away.

- We intend to see Mr. Mundson.

- You said that before. I said...

- Get him on the telephone. Please.

[...]