Performed by Composer (Piano) and Agne Matuleviciute (Magnets)
Lotus and Lightning comes from the Tantric metaphor describing sex. The female is the Lotus (emptiness) and the male is Lightning (vajra) the two combined have the spark of enlightenment.
The metaphor is not just smut, the focus is about the fact that all things are an opportunity for enlightenment, and if you approach sex in a way that isn't just mean lust, you can experience as sensation far greater and far more permanent than sex.
This metaphor is translated into the duo for piano and magnets quite simply, the magnets are the lotus, due to not having direct contact with the strings. The piano keyboard is the lightning as it strikes the strings. The two together try to find something greater.