It wasn't the German gin.
2 seconds sound clip from the The Third Man (1949) movie soundboard.
You can hear this line at 01:07:58.816 in the Blu-ray version of the movie.
Quote context
[...]
- Where were you when you saw him first?
- Fifty yards right down there.
- I was on that side. His shadow was on that side. And there are no turnings on either side.
- I tell you, I heard him running ahead of me!
- And then he vanished out there, I suppose, with a puff of smoke and like a clap of...
- Well, what's this? Where are we?
- It's the main sewer. Runs right into the blue Danube. Smells sweet, doesn't it?
- We should have dug deeper than a grave.
- Yes. Joseph Harbin. Medical orderly at the general hospital. He used to work for Harry Lime.
[...]