Two packs of cigarettes say they don't get out of the forest.

2 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 00:07:17.295 in the Blu-ray version of the movie.

Quote context

[...]

- I hope they hit the Danube before dawn.

- They got a good chance.

- It's the longest night of the year.

- I bet they make it to Friedrichshafen.

- I bet they make it all the way to Switzerland.

- And I bet they don't get out of the forest.

- Now what kind of crack is that?

- No crack.

- Two packs of cigarettes say they don't get out of the forest.

- That's enough, Sefton. Crawl back in your sack.

- He'd make book on his mother getting hit by a truck.

- Anybody call?

- Come on, Sefton, butt out.

[...]