A Cpl crewman is making up some maps and briefly leaves the room leaving said maps unattended
In a similar vein - cutting out the Steinhudermeer from a spare sheet and prit-sticking it over Gutersloh.
Can't remember which, but either Spike J or Jock Brand spent ages colouring in all the built-up areas in BAOR with red lumi, specifically for night-flying, only to find it utterly useless under a red cockpit light.
Ever notice how, when putting a map together, you were literally surrounded by your mates giving you tips and hints, right up to the moment you need 6 hands to stick the fablon on?