A swinging pendulum is notoriously mesmerizing—that’s why hypnotists are always swinging pocket watches in front of someone’s eyes to put them under. But when you add an extra point of articulation, creating a double pendulum, the seemingly random and flailing motions that ensue go well beyond hypnotic.
Source: Gizmodo – Say Goodbye to Productivity While You Watch This Glowing Pendulum Swing Wildly Around