this particular asteroid is about two times the size of the Empire Sate Building and, in case you 've never been to New York City, that's pretty freakin' huge.
If you're looking for a little more reassurance that you won't die today for a mondo space chunk hum-chucking into our world than what an overweight morning radio host can provide, take it directly from the source itself.
You probably have seen video of the fireball streaking across the Maine sky on Tuesday morning (if not look below). It was quite a site to see. If you can find a chunk of the meteorite you can make some serious cash.