Haha reminds me once of what happened.
My DSL service and modem was not working, so i jumped under my desk (humongous tangle of wires there) and checked each phone line connection, even reset the modem a couple of times, but the "broadband connection" light on my modem just refused to go green. Finally, out of frustration, i called tech support:
"Hello, thank you for calling bellsouth tech support"
"Yea, my modem is not connecting with the broadband, is the service down? (it happens *sometimes*)"
"Hrm...well sir have you checked all your telephone wires?"
"Yea..."
"All of them?"
::Glance at telephone wire leading from main jack in to surge protector, where the rest of the phone lines were connected; it was not plugged in::
"Ohhh yea....duh...ok, thanks"
Man did i feel like an idiot