What's the idea? You don't think you can eat that stuff.

2 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 01:19:12.148 in the Blu-ray version of the movie.

Quote context

[...]

- Very well. If you insist on details, I have ways of finding out about that blasted time bomb.

- Good day, sir. You will forgive me for receiving you like this.

- Perfectly all right. I do not like boots.

- Schulz!

- I believe it. I believe it.

- Let's have your dog tags for the Christmas tree.

- What's the idea? You don't think you can eat that stuff.

- We're building us a smudge pot so Patton can find us when he comes.

- Twenty parts of cellulose, one part phosphorous. Watch.

- He'll be able to see our smoke signal four miles away.

- But Patton is 400 miles away.

- Well, I say, be prepared.

- Heh, okay, boy scout.

[...]