Following is a piano cover done by ear only. This guy is just amazing! Can't imagine how people can do the whole score just listening by ear. Compare this with the original posted below.
Here is the original one. This is one of my fav. score. I am fan of Harry-Gregson Williams. If you don't have full 7 mins to listen, at least try first 2mins:
http://youtu.be/Q41fwx1tfHc