I don't have the patience to type it out and make it as funny but as a fellow sys admin type I empathize.

Last week I talked to someone over the phone who swore up and down their computer was dead. Tried to troubleshoot over the phone but they of course swore they had tried it all. So I go down three flights of stairs, over to another buidling and up another three flights...to find her monitor was switched off.

I didn't say a word I just walked in, looked at it for a second, hit the monitor power switch, gave her my patented "YOU ARE A FREAKING MORON" look and walked away.