I must say, the mind reels.

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

You can hear this line at 00:10:27 in the Blu-ray version of the movie.

Quote context

[...]

- And I love the kids, too. I mean the kids the wives bring. It should be sad seeing kids there, but it isn't.

- They all have ribbons in their hair and lots of shine on their shoes.

- You'd think there was going to be ice cream.

- Now, as I understand it, what we're doing is getting you ready to visit somebody at Sing Sing.

- That's right. You can always tell what kind of person a man really thinks you are by the earrings he gives you.

- I must say, the mind reels.

- May I ask whom?

- Whom what? Oh, whom I go to visit, you mean?

- I guess that's what I mean.

- I don't know that I should even discuss it. Well, they never told me not to tell anyone.

[...]