The pacing of this song seems to represent the emotion of everything closing in on you. It starts off really slow which is when the walls begin to move. By the end of the song, the walls are crushing you and there's no way out. So you would be panic and your heart would beat faster, so the music is very fast by that point. When the music stops, it's finally all over, so it all fades away, and the emotions stop as well.
The pacing of this song seems to represent the emotion of everything closing in on you. It starts off really slow which is when the walls begin to move. By the end of the song, the walls are crushing you and there's no way out. So you would be panic and your heart would beat faster, so the music is very fast by that point. When the music stops, it's finally all over, so it all fades away, and the emotions stop as well.