I don't know. It's probably nothing.

5 seconds sound clip from the Breakfast at Tiffany's movie soundboard.

You can hear this line at 00:43:59 in the Blu-ray version of the movie.

Quote context

[...]

- There's such a lot of world to see.

- We're after the same rainbow's end waiting 'round the bend.

- My huckleberry friend, Moon River and me.

- Hi. What you doing?

- Writing.

- Good.

- Well, hello. What's wrong?

- I don't know. It's probably nothing.

- I want to see if he's still there.

- See if who's still there? What are you talking about?

- Look.

- See? I noticed him yesterday afternoon.

[...]