How did you not notice that?

Staff Caller: "I think the UPS has gone out. It's making a terrible noise"
Help Desk Guy hears the noise of the thing. Sounds like it has either lost power or has failed.
Help Desk: "It hasn't come unplugged or loose has it?"
Staff Caller: "Nope, first thing I checked"
Help Desk Guy: "Ok, we'll have some one come and see if we can get you plugged in somewhere else for now while we get the UPS checked"

Time passes

Staff Caller: "Never mind. It looks like the power is off on our whole floor."