Sign that the hamsters were taking unauthorized breaks.
Every time this happens I get the strangest feeling that all the servers are sitting in some guys basement somewhere, cobbled together out of old computers and a T1 line running across a yard into some building next door, tucked behind a cabinet nobody has moved for 15 years.
I then imagine the IT sitting in a scruffy old chair, next to a pile of pizza boxes playing World of Warcraft and shunning the sunlight like Smeagol.