I mean, is the spaghettification of John Cusack using awesome 2012 doomsday graphics too much to ask? Instead of an improbable alien spacecraft appearing over the White House, why not use a black hole, producing so much tidal shear that it rips the building apart brick-by brick? Oh, and then have all the matter being sucked into the black hole accelerate to relativistic velocities, creating an X-ray belching accretion disk, lighting up the solar system with our planet’s regurgitated mass-energy? Movie audiences will have a total doomgasm over that!
Or we could just use it as a nifty time travel device.
*I just saw this on Graph Jam, had a giggle. More sci-fi black holes please!