It’s a well understood technique, in literature, music, movies, even politics, that if you want something to have particular impact, you precede it with something quiet, calm, inert, mundane. The classic horror scare technique is to dupe the audience into thinking that the protagonist is safe, before slamming them sadistically into new levels or terror and torment – think, in Alien when Ripley thinks she’s safe in the shuttle only to find that they alien followed her in.
Metal is a musical genre that uses this technique to devastating effect: there’s quiet bit (usually around two thirds of the way through the song) that lulls you into a little pocket of calm – the eye of the storm – before smashing back in, like a cricket bat to the side of the head, with the most brutal part of the track that make you mosh so hard your head snaps clean off at the neck. Bloody marvelous!
Here’s a few examples of this technique used that will make you run, face first, into a brick wall.