Testimony of S. Semenov, as recorded by Leonid Kulik's expedition in 1930.
"At breakfast time I was sitting by the house at Vanavara trading post (65 kilometres/40 miles south of the explosion), facing North. [...] I suddenly saw that directly to the North, over Onkoul's Tunguska road, the sky split in two and fire appeared high and wide over the forest (as Semenov showed, about 50 degrees up - expedition note). The split in the sky grew larger, and the entire Northern side was covered with fire. At that moment I became so hot that I couldn't bear it, as if my shirt was on fire; from the northern side, where the fire was, came strong heat. I wanted to tear off my shirt and throw it down, but then the sky shut closed, and a strong thump sounded, and I was thrown a few yards. I lost my senses for a moment, but then my wife ran out and led me to the house. After that such noise came, as if rocks were falling or cannons were firing, the earth shook, and when I was on the ground, I pressed my head down, fearing rocks would smash it. When the sky opened up, hot wind raced between the houses, like from cannons, which left traces in the ground like pathways, and it damaged some crops. Later we saw that many windows were shattered, and in the barn a part of the iron lock snapped."
The Tunguska Event of 1908 was in the exact middle of nowhere. Now imagine it happening again, but this time in the exact middle of somewhere. A chunk of rock like this hitting a major metropolitan area or densely-populated regions of the third world would have instantly resulted in millions of dead humans, inestimable losses of property, and knowing what little I know about the way the leaders of most governments on the planet behave, there would have been more than a few intercontinental ballistic retaliatory strikes sent whizzing towards high-value targets around the world, just in case the big explosion was an attack by enemies unseen, unknown or imaginary. When in doubt, MIRV them.
If you think that's sloppy thinking, remember the immediate reaction to the Oklahoma City bombing. No one thought it was a tinfoil-hat-wearing Kansan. At first, everyone around here thought it was an attack by A-Rabs. Now, multiply that devastating explosion's effects by a million or more times. Missiles would start flying before the shock waves peter out. Remember, we are not long out of the trees, and we act as such.
Since there are a total of say, four or five people worldwide on the constant lookout for flying rocks, we had a couple of weeks notice that DD45 - the rock has a name - was headed our way. One of the slide-rules-in-charge determined that there was no danger. Orbital mechanics liberally applied, we slept soundly, unknowing. Some rocks fly by without anyone seeing them beforehand. Think about that.
So, if you're feeling particularly self-important, or perhaps think that your particular political persuasion or what passes for a religion is the only answer to the complex questions of life, the universe and everything, you might consider pulling your head out of that dark place and looking around a bit. There may be another stony visitor on the way.
Enjoy your day.
Thus spake the rabbit.