I can imagine thinking, let's create an album of musical portraits of people we admire.
I can imagine thinking, let's make an homage to novelist Patricia Highsmith.
I can imagine thinking, let's incorporate Patricia Highsmith's fascination with snails somehow into our musical homage.
I can imagine thinking, let's see if we can close-mike some snails and get some sounds from them.
I can even imagine thinking, hmmm, these snails sure are quiet, so let's see if we can get the snails to trigger some sounds somehow.
The leap I can't imagine is, let's put the snails in a glass tube and shine beams of light through the tube using penlights and lasers that are connected to a light-sensitive theremin, then record the snails as they crawl up the sides and play the theremin with their antennae, then create a musical work out of that.
That's just genius.
The whole brilliant and hilarious video is worth watching, but if you're short on time this particular segment is about halfway through.