What a brilliant line!
Writing-wise, in but a few words, we immediately get Reuben’s style of character. We know he has a history with Danny and Rusty, and he believes in giving and remembering favours… even if he hasn’t seen them in a while. And since we, the audience, don’t really care what that history is, we don’t have to hear the detail!
It’s also a great line to remember in our own lives. We as people are interconnected through favours given and collected… even if we don’t keep in touch as much as we’d like. Makes you think about your own network. Who are you connected to because of “the thing with the guy in the place?”
Cheers & a good shoot to you,