It seems to be a favoured line for a classic children’s tale of the sky falling, but on February 15, 2013 the sky really was falling in part of Russia.  A large meteor entered the atmosphere and heated up to high enough temperatures that it did what is called an airburst.  This airburst would be fine and dandy had it happened higher in the sky and from a smaller rock, but this one as a biggy and it exploded a mere 10 kilometers over the city of Chelyabinsk.  The force of the explosion was enough to collapse the roof of a factory and to shatter windows of many buildings.  Some 1200 people were injured, mainly from the glass and six thousand buildings damaged.  Today is Sky IS Falling Day in observance of this freak event that literally came out of nowhere.