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In the sequel to the critically acclaimed 2010 action film Inception, Christopher Nolan completely loses his mind and hires Leonardo DiCaprio to play the role of a corpse rolling around in a hallway for 12 hours straight. Oddly enough, he delivers an emotional performance consistent with his role in the first film.
The song is an excerpt from "Waiting For A Train" of the Inception Soundtrack, composed by Hans Zimmer.
The map featured is Gm_Corridor by Hiyougami, which can be downloaded here:
Also, if you listen REAL close, you can hear all the prop sounds.