Ames' Window

Ok, I'll try to explain this as best as I understand it.

A clever person called Ames designed a window that's got built in perspective (ie it's narrower one side than the other). He also (cleverly) stuck a stick in the middle of this window. So far so good.

Here's the genius bit - when the window spins around, our eyes get confused, and start misinterpreting the shape and the direction and everything.

Just watch :)