Dear ...ex,
I am very sorry to hear of your situation. First question I would ask is what cracked, the screen (i.e. the glass BEHIND the Gorilla Glass), or the Digitizer (the Gorilla Glass)? Depending on which cracked will suggest why it may have cracked perhaps said...so easily.
There are several potential explanations but the most likely is that the glass (whichever it was) was hit at a place where there was already one or more microscopic stress fractures from the initial cutting at the factory. The fact is, it's impossible to cut glass and not leave microscopic stress fractures. There are many things that a manufacturer can do to minimize the effect of such fractures, but they are created during the cutting and if hit just right will cause the stress to be relieved across the glass sheet in one or more directions.
The thing is, there have been people who have reported dropping their Droid RAZR from 2 stories up on a ladder, accidentally tossed across asphalt, sat on, etc., and never suffered a break, and then there's the story that will always stick with me of a woman whose Gold bracelet dropped onto the flat face of the digitizer from about 6" above and cracked the screen.
Get back to us on which glass it was and we can at least assist you in getting it repaired.