From SMUPhysics https://twitter.com/SMUPhysics on Twitter: Have you checked out our Chaotic Double Pendulum in the lobby of Fondren Science Building? Give it a spin! Try as you might to reproduce the exact starting point of the drop, you can't, and tiny differences in initial conditions are amplified in the system! https://twitter.com/SMUPhysics/status/1047215817635635200/video/1 https://chirp.cooleysekula.net/attachment/52164