You're way ahead of me, Keyes.

3 seconds sound clip from the Double Indemnity movie soundboard.

You can hear this line at 01:19:30 in the DVD version of the movie.

Quote context

[...]

- Go ahead. I'm listening. (2)

- You know what? That guy Dietrichson was never on the train.

- He wasn't?

- No, he wasn't.

- Now look, you can't be sure of killing a man by throwing him off a train that's going 15 miles an hour. The only way you can be sure is to kill him first and then throw his body on the tracks.

- Now that would mean either killing him on the train or, and this is where it really gets fancy, you kill him somewhere else and put him on the tracks.

- Two possibilities, and I personally buy the second.

- You're way ahead of me, Keyes.

- Well, look, it was like this. They killed the guy, the wife and a somebody else...

- And the somebody else took the crutches and went on the train as Dietrichson...

- Then the somebody else jumped off...

- Then they put the body on the tracks where the train had passed.

[...]