Gutersloh sometime in the 80s. The inject was that an air traffic controller had lost his marbles, had taken a hostage and was gibbering ENDEX on the station tannoy. The ATC supervisor went upstairs to notionally talk to the controller. In classic Indiana Jones fashion, the ATC supervisor got to the top of the stairs pulled-out his pistol and shot the controller without stopping for a single breath. The TACEVAL man was most un-amused.