Customer: "Hi I can't get on the Internet and the icon says no network connection."
Colleague: "Can you check the network cable for me."
Customer: "Ah, we have an office dog and the cable seems to be chewed."
Colleague: "OK borrow another cable out of another PC for a minute and see if that fixes it."
Sounds of people in the background screaming "I've gone down!"
Customer: "No, that's still not working"
Colleague: "You've taken the server cable!"