From Collossal:

"Unstable Matter is kinetic sculpture by Finnish artists Tommi Grönlund and Petteri Nisunen, a.k.a. Grönlund-Nisunen. The moving table contains thousands of small ball bearings that move and crash within the confines of a giant wobbly table, sort of a modern take on a rain stick. The table is part of several kinetic and magnetized works by the duo that were recently on view at Esther Schipper in Berlin."