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My favourite tale of aircon woe is actually adjacent to the server room - in the mailroom there was an aircon unit which, as it turned out,didn't drain to the outside, but to the adjacent room. If you cut the power to it, instead of siphoning the water away, the water just overflowed in the other room... through the false floor...to the floor under the server room....where some wag was running 2 racks off some Argos-standard 4-ways.... The company employed a new cleaner, who dutifully turned off the aircon in the mailroom on her first night - cue hi-jinks :-(