There is a 2-book story out there, written by the incomparable Dan Simmons... One book is Ilium and the other is Odyssey. Killer story. Anyway, the bad guys develop a mini-black-hole and launch it. They kill the rocket so the black hole falls to earth. It then begins consuming all the matter (and light) in its path as it falls. Going to the center of the Earth and out the other side, continuing on up into near-space, where it slows and stops. It then begins falling again. Only this time, the Earth has rotated, so the black hole punches a new hole. Ad infinitum. Soon it's Earth-Swiss-Cheese! Yay!