I looked at that tutorial, and OMG, they did something that I would suggest you NEVER DO!!! If you look at their pics, they show wrapping the wire around the ground prong of a plug, and plugging it it. What's wrong with that? the plug they used wasn't connected to anything, so he basicly left a live 120V wire just laying out on his floor. On top of that, if he were to turn the screwdriver one way, then pull on it a little (not on purpose, I'm sure) the wire he has wrapped around the ground plug could short out to one of the live plugs. I would suggest that before anyone attempt this, they use an old plug and cut the other 2 prongs off of the plug before they use it.