- Sefton.
- What'd you expect, a St. Bernard dog?
- Not you.

4 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 01:55:49.051 in the Blu-ray version of the movie.

Quote context

[...]

- Let's synchronize the watches. It's 11:42 sharp.

- Check.

- Just one more word. If I ever run into any of you bums on a street corner, just let's pretend we never met before.

- Shut off the moaning or you'll have the machine guns on us. Shut it off, lieutenant.

- My legs are frozen.

- You'd better get that blue blood circulating because we're busting out of this stink-hole in exactly one minute and 20 seconds.

- Sefton.

- What'd you expect, a St. Bernard dog?

- Not you.

- Want some brandy?

- Yeah.

- Who doesn't? Suppose we wait until we hit the Waldorf-Astoria?

- Heh, okay.

- It's on me. You won't get off that cheap.

- What are our chances of busting out of here?

- We'll know in about 40 seconds.

- Hold his leg up.

[...]