teachyoufact on Instagram: "The post features a 15-second video of a 3D-printed flexi toy, where purple and black wavy halves merge and stretch into fluid, skull-like forms, creating a hypnotic illusion of impossible physics. Shared by @area389b , known for curating viral kinetic sculptures, the clip exploded to 1.5 million views overnight, tapping into a fidget toy trend that originated on Tik Tok in 2023."