Caller: Hello, our printer is not working.
Me: Hrm, might be a problem with the print queue, let me check... ah, I can't get to the print server, it seems to be down. Could you reboot it for me?
Caller: No. There is a power cut in that part of the building.
Me: I'm afraid there's not a lot I can do for you in this case. The printer needs the print server to work.
Caller: Oh, OK. Thank you. *click*
It was only afterwards, that I realised that this was one of the printers that are physically plugged into the print server, rather than the network printers. Which meant the printer itself was also affected by the power cut. So why did he call me, when he knew he had no power?
In the nine years I worked in support, this is the closest I've got to the apocryphal "I can't tell if it's plugged in, there's a power cut!". I got most of the classics, but I never got the "drinks tray" one... and I'm glad I quit before I did!