@illusionlab_jp: Blink once and this wave cylinder may spin the other way 👀 EASY TIP: Look at the bottom edge, then blink. 🧠 Why: a flat picture fits two 3D spins, so your brain has to pick one, and it can switch (kinetic depth effect). Which way did you see it FIRST? Comment ↻ or ↺ 👀 Follow Illusion Lab for new illusions every day 🌀 #opticalillusion #illusion #reversethespin #brain #psychology #neuroscience #trippy #brainchallenge