What are you guys trying to prove anyway? Cutting trap doors. Digging...

3 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 00:26:28.445 in the Blu-ray version of the movie.

Quote context

[...]

- How come you were so sure Manfredi and Johnson wouldn't get out of the forest?

- I wasn't so sure. I just liked the odds.

- What's that crack supposed to mean?

- They're lying dead out there in the mud and I'm trying to find out how come.

- I'll tell you how come. Because you, our security officer, said it'd be safe and you, the barracks chief, gave them the green light, that's how come.

- What are you guys trying to prove anyway? Cutting trap doors. Digging...

- Listen, Sefton!

- You listen to me!

- What do you think the chances are of getting out of here?

- And let's say you make it to Switzerland. Let's say to the States. So what? They ship you out to the Pacific, slap you in another plane, you get shot down again. Only this time you wind up in a Japanese prison camp. That is, if you're lucky.

- Well, I'm no escape artist.

[...]