Imagine The Most Powerful And Fantastic Natural Force That Generates Sound And You Probably Think Of Thunderstorms. Björk Harnesses Lightning To Make This Song The Bassline Is The Sound Of An Electrical Discharge Created By A Tesla Coil Forming A Leaping Musical Pattern — The Arpeggio. As The Vocal Arrangement And Lyrics Yearn For Miracles The Basslin Teeters Between Musical And Natural Sound And Between Heard Sound And Felt Vibration.