The experience of watching your world blow up to strains of Pink Floyd's Dark Side of the Moon, is an emotional one.

In this mashup snatched from Discovery Channel's Miracle Planet series and transplanted to YouTube with a new sound track and subtitles, a huge asteroid slowly travels (at 500 km and hour) towards Earth, casts first an ominous shadow across it and then slams into it with a force that rips its crust off and renders the planet uninhabitable.

The final frame reveals that "this has happened at least six times in Earth's history.