This one has been making the e-mail rounds. I've actually felt like the cat a few times when I was trying to get a printer or copy machine to work.
http://www.youtube.com/watch?v=kvBiSW5QFKY
http://www.youtube.com/watch?v=kvBiSW5QFKY
Those are "oldie but goodies." Always good for a chuckle.