One of the mail carriers & Lucky have a relationship. I'm 3rd wheel but sorta included.
So here's the routine: Lucky can hear the truck's motor even that it's silent, and he charges our front screen door (yes, the screen is torn) for me to let him out, after which he runs out to yap at the truck at the mailbox outside the gate. This one carrier in the rotation interacts with him cutely and then drives away to a point up the street and turns around to do the other side of the street while Lucky keeps the watch and barking until the return trip on the other side of the street.
Here's the thing posted before: After the return trip and the whole deal is over, Lucky stays at the gate looking back to our front door for me to go out of the fence to retrieve the mail.
But new info: Caught the two of them with a new interaction today. The carrier inched the truck a couple of times while looking at Lucky doing the barking thing, then he *GUNNED* the engine to race off showing him his fence running was no match. Boys gotta play and one-up.