This is it.
1 seconds sound clip from the Stalag 17 movie soundboard.
You can hear this line at 01:57:56.303 in the Blu-ray version of the movie.
Quote context
[...]
- Twenty seconds. Open the hatch.
- Eight seconds. Seven, six, five four, three two, one. Go!
- Ich bin ein Deutscher! Ich bin ein Deutscher!
- Let's.
- All right, men, everybody back in their bunks like nothing happened.
- What do you know? The crud did it.
- I'd like to know what made him do it.
- Maybe he just wanted to steal our wire cutters. You ever think of that?
[...]