Not a military story, but I used to run Tech Inspection for the old ARRA - a motorcycle roadracing sanctioning body in southern California back in the 1980s and 90s. There was a guy who raced in our club with a good deal of Yamaha factory support, and his bikes were always immaculately prepared by his crew chief and then wheeled over to our station for inspection. (This crew chief later went on to be Crew Chief for Yamaha USA's factory superbike racing effort.) Anyway, one morning he brings the bike over to tech, and as usual, it's perfect. As he's wheeling the bike away back to his pit, I say, "Hang on a second... ...your Johnson Rod is dragging!" ...and he actually stopped, tilted the bike a bit, and looked to see what needed fixing.
I grinned at him, and he grinned back and went about his business. He was a nice guy and a true professional who knew how to take a joke.