You guys need to watch it harder. See which leg she is standing on while she is spinning. After she has switched directions, see that she's standing on a different leg. It's not an optical illusion. We perceive the direction she is spinning because of which breast appears first and such-like. There's no two ways about which way she spins. It's not an optical illusion, it's a trick, and I'm trying to find out where it came from.