Most amusing, isn't it?
2 seconds sound clip from the Stalag 17 movie soundboard.
You can hear this line at 01:14:37.110 in the Blu-ray version of the movie.
Quote context
[...]
- Sabotage. He blew up a train.
- I didn't do it. I didn't do it. I didn't do it.
- Twenty-six carloads of munitions gone off like a trick cigar.
- Uh-uh. You are being rude again.
- Nine-thirty. General von Pfeffinger will be at his desk by now.
- Shall we call Berlin and tell him the good news?
- I didn't do it. I didn't do it.
[...]