All right, I'll tell you. A friend of mine's got a funny theory. He says when two people commit a murder, it's sort of like they're riding on a trolley car together.
10 seconds sound clip from the Double Indemnity movie soundboard.
You can hear this line at 01:36:09 in the DVD version of the movie.
Quote context
[...]
- And what are you thinking about now?
- I'm all through thinking, baby. I just came to say goodbye.
- Goodbye? Where are you going?
- You're the one that's going, baby. Not me. I'm getting off the trolley car right at this corner.
- Suppose you stop being fancy. Let's have it, whatever it is.
- Maybe he's got something there.
- Just who are you talking about?
- An acquaintance of yours... A Mr. Zachetti.
[...]