Wow. My initial reaction is that I LOVE this move.
Any other thoughts?
Jeff's edit - 300 Character Fact: The Tunguska event was an explosion that occurred near the Podkamennaya (Stony) Tunguska River in what is now Evenkia, Siberia, at 7:17 a.m. on June 30, 1908.
The explosion was caused most probably by the airburst of a meteorite or comet 6 to 10 kilometers (4?C6 mi) above the Earth's surface. The energy of the blast was later estimated to be between 10 and 15 megaton TNT. It felled an estimated 60 million trees over 2,150 square kilometers (830 sq mi).
In recent history, the Tunguska event stands out as one of the rare large-scale demonstrations that a full doomsday event is a real possibility for the human race.