Often the orchestras usually versionar besides classic subjects, also popular songs or known. For this movie, it was probably the other way around, and even totally different.
It is the Soundtrack that represents the film, in turn, within the film is a composition of the protagonist that does for his Orchestra. For moviegoers, an Inception Musical Really sounds beautiful to hear the Orchestra version before the Band alone.
The endings of each film are always accompanied by a good song, which immortalize the scene, lead to a state of relaxation, and tend to raise emotion for the film, although the value of it is not so important, music can To make a movie look good, at the end of the day the sounds carry the thread of the plot and reinforce its message