Random Fact #7: Sometimes when you empty out a dorm room, plug in a vacuum cleaner, and then turn the vacuum on, it makes the electricity in the entire room (and just that room) go out.
Source: Personal Experience. This has happened to me on two out of two moving-out days. Never had any problems vacuuming the entire year. The last day when I've just packed up all my stuff: plbbt. Power's out. Uncanny.