- Hey, Schulz.
- Ja?
- You guys have some machine-gun practice last night?

3 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 00:10:57.223 in the Blu-ray version of the movie.

Quote context

[...]

- I understand the Krauts had a composer way back with a Johann Sebastian in it.

- But I can tell you one thing: Schulz was no composer. He was a schweinehund. Was he ever a lousy schweinehund.

- Gentlemen, you must get out for roll call.

- Your blower's busted.

- Ja, good morning to you.

- Oh, blow it out your barracks there, Schulz.

- Aufstehen, everybody. Come out. Get down.

- Okay, come on, you sack rats. Cut the beefing and get up.

- Hey, Schulz.

- Ja?

- You guys have some machine-gun practice last night?

- Oh, terrible. Such foolish boys. Such nice boys.

- I'd better not talk about it. It makes me sick to my stomach.

- Aufstehen, aufstehen. Aufstehen, roll call, everybody. Raus!

- You killed them, huh? Both of them?

- Oh, such nice boys. It makes me sick to my...

- Don't wear it out!

[...]