The whole purpose of the abrupt changes in this song in particular is to signify the stages of a near-death experience. At first its all chaotic and confusing, but later comes the stages of acceptance, peace, and relief.
This is actually a work in progress of several ideas I had spinning through my head. I apologize for my "switching."
I love the beginning! but everything after that in my head I was screaming NOOOOOOOOOOOOOO!! why did this person switch the music.