Re: Errr.... Is that you Ross?
Apparently it all went very quiet (and if you've done something similar, you'll remember that terrible silence, as if hundreds of fans had suddenly stopped).
Even scarier: a low rumble in the computer room soundscape goes absent, and after a few seconds of puzzlement, trying to determine what exactly it might be that's causing the change, it hits you that it's the aircon. And there's close to 100kW of equipment still running, belching heat into the room.
I think it's the only time I've seen a thermograph pen move.