Well, this one's been kicking around in my head for a week and a half but I'm finally writing it down now.
As he passed a table with three older men he thought were ranchers, Dane heard one say: "No, it can't be - but it sure looks like him." Then, louder, the man said: "Hey, gunny!"
Dane casually glanced around. Nobody else had reacted to the comment so he turned to the older man and replied: "Ain't been a gunny for nearly ten years, nor a marine for nine."
The man just took this in stride and asked: "What do you call a Marine with multiple Good Conduct medals?"
Something about the man's voice triggered a memory and the question had him suspect that he knew who this was: "Well, a long time ago, I was told the only answer is 'an obvious plant,' sir."