Once upon a time, Yorkie was on a Junior NCO Cadre, at a barracks in Germany. Part of the course was, naturally, the gas chamber, but for some reason we had to use one on a nearby Bundeswehr camp. Now this chamber was a splendid affair, with huge picture-windows so that the DS could remain outside while watching us victims go through the routine of running round in circles and jumping up and down to get hot and sweaty.:sweat:
This chamber was quite palatial in comparison to Brit ones, with, I noticed, an extraction system with the outlet apparently in close proximity to where our tormentors were standing. After determining that one of the switches on a panel by the door wasn't for the lights, I managed to surreptitiously 'knock' the extractor fan on, resulting in the DS getting more than they'd bargained on.:-D