A chain reaction marble run perfectly synchronised with Tchaikovsky’s "Waltz of the Flowers" by kinetic artist Mark Robbins. https://t.co/MwvxtQ1MhW https://video.twimg.com/ext_tw_video/1833833205213839360/pu/vid/avc1/1280x720/mFPEROEc3KpYjbx6.mp4?tag=12