Here's the thing that scares the Pajesus out of my Sci fi side....
What if it is not one asteroid, but many?
I have been reading some stuff and watching programs on the Universe and Planet Earth on the Discovery Channel etc....and they say that on december 21, 2012 at 11:11 am (of course it was 11:11 am for those of you who know my eleven problem or cloud following me

) all the planets in our galaxy line up perfectly with the center of the Milky Way...this happens once every 26,000 years...well scientists and others are predicting all kinds of bad stuff that can happen with this and our gravity...
I did not understand it enough to be able to explain it, but i understood it enough to scare the pajesus out of me....just do some research on the lining up of the planets in this manner....anyway they were saying that this would throw off some of the protection we have from outside debris hitting us...basically, our shields will be down.