GagHalfrunt
Lifer
Pretty much anything beyond turning the machine on. Most people are completely and utterly clueless, for all they know the thing runs half on nuclear power and half on a hamster running in a wheel. I swapped out a power supply in about 3 minutes for my cousins machine and she was totally amazed. All those wires looked like a jigsaw puzzle to her, but it's one of the most idiot-proof tasks possible.