Inititally I thought I was coming across a standard atmospheric lo-fi instrumental, although the overall progression of the track actually took me by complete surprise.
Right in the middle of "Calm", everything changes out of the blue with the arrival of these spellbinding strings - consequently altering the track into a more cinematic mood. This also heightens suspense since we're left wondering what's about to happen. And right on time the hard-hitting drums swiftly slide into the mix for an epic yet simultaneously groovy ending.