She described her reaction to Arthur's metamorphosis dance as being similar to when she found his notes and tonality, whilst adding that the theme - "Bathroom Dance" is often performed on an electric cello instrument called the halldorophone, which Guðnadóttir helped develop: "It's a feedback instrument [...] A lot of the electronic sounds that you hear in the score, it's all performed live, and it's all coming from that instrument and the connection with the amplifiers."