I was concerned entering this thread that someone would be complaining about the military being hard on them. I am pleased with the actual content of this thread.
There was a guy in my boot camp division who left his chain out of his shirt. The RDCs put us all on the "toe line"—a line of tiles in front of our racks where are toes were expected to line up
perfectly—and ordered this guy to face his rack. The RDC then pulled the coat hook out and hung his chain, still attached to his neck, to the rack. The guy was told to yell "I left my chain out" until relieved. This lasted about 45 minutes.