- How?
- That's what we'd like to know.

2 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 00:54:42.640 in the Blu-ray version of the movie.

Quote context

[...]

- Yeah. And about three minutes later you can hear it. Boom! Understand? Broke every window in Frankfurt. Understand? It was gorgeous.

- Wait a second. I'm not through. Understand?

- I wouldn't talk about things like that.

- They never caught on.

- They may. That's why I'd keep my mouth shut.

- Why? We're all Americans here, aren't we?

- The Krauts have a way of getting information.

- Yeah, especially in this barracks.

- How?

- That's what we'd like to know.

- There's only one pair left.

- Well, get some more.

- Say, where does a fellow take a hot shower around here?

- Hot shower, heh? Dig him.

- Sorry. No hot showers. You have to wash in the latrine.

- In a latrine!

- What did you expect, glamour boy? An officers' club with a steam room and a massage, maybe?

- Hey, just a minute. You made a couple of cracks before and I let them slide, but I don't intend to take any more.

[...]