- Who'd you see at the concert?
- Nobody.
- A nobody by the name of Diamond.

4 seconds sound clip from the The Big Combo (1955) movie soundboard.

You can hear this line at 00:59:24.717 in the Blu-ray version of the movie.

Quote context

[...]

- I want to talk to you.

- Not now, later.

- No, now!

- Come here, I want to show you something.

- What is all this?

- This is my bank. I could've built this vault in my apartment, but that would have been too obvious.

- We don't take checks, we deal strictly in cash.

- There isn't anybody I would trust with so much temptation except myself. Or maybe you.

- Trust me.

- Who'd you see at the concert?

- Nobody.

- A nobody by the name of Diamond.

- Then, why do you ask? You know everything.

- There's one thing Mingo and Fante can't tell you: whether I still love you.

- What did Diamond tell you?

- That he's in love with me.

- Diamond in love? That's not possible, any more than this clever machine.

[...]