I was sure I was going to stupidly short everything out. I'm sure it' was hysterical to watch. There was a real slow motion action on everything, and I kept making sure I was grounded! Fortunately, i was alone in the house at the time. I've since bought a bigger hard drive for my TiVo and successfully installed it with some hand holding from my husband (just needed for brute force - those plugs need heft!).