Hey, that's a ringer.

2 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 01:24:35.343 in the Blu-ray version of the movie.

Quote context

[...]

- Where'd you learn your pitching?

- From the farmer's daughter.

- Something I've been meaning to ask you. It has to do with security.

- Shoot.

- We're having a tough time keeping our stuff hidden from the Krauts. Like our escape equipment, for instance. So we're always looking for new devices. Looks like you found one.

- Me?

- Well, I mean the lieutenant. He hid a time bomb on him, right? He even carried it through prisoners' search, didn't he? Where did he hide it?

- Right in his pocket.

- The old cigarette-match gag.

- What's that?

- You take a book of matches, light a cigarette, slip it in. It takes about three minutes for the cigarette to burn. Then it sets off the matches. Simple.

- Some time bomb.

- Hey, that's a ringer.

- O come ye, o come ye to Bethlehem.

- Come and behold him, born the king of angels. O come, let us adore him...

- Don't forget the corkscrew. O come, let us adore him And have a cigar.

- And have a cigar.

- Thanks.

[...]