When the power dies to a lab... (Score 1)

I remember an incident during my final year of CS when the power to the entire building went down. (I said "remember", not "fondly remember")

The realisation that everything was a lot quieter, when we hadn't really noticed the noise before was quickly replaced by the noise of hundreds of screaming students and sysadmins.

Now I find the humming of a fan quaintly reassuring.