Two slabs, formed of modelling clay and evoking topography, are rained upon by a scientific-looking apparatus. The rainfall varies from heavy to light to none at all. The shifting drone of the pumps brings additional rhythm to the piece—and when they stop the quiet sound of rain comes to the fore. Droplets form, then coagulate to form blobs and pools, which eventually grow large enough to slide suddenly across the slab and off the edge.