Leandro Erlich created this optical illusion at the [Barbican](http://www.barbican.org.uk/artgallery/event-detail.asp?ID=14756) in London to create the visual effect of weightlessness. He used a wall of giant mirrors and propped them up against a huge print of a Victorian terraced house. It looks so real, it fooled me when I first saw the photos!
Watch this acrobat scale the walls of this place!
Here’s a hula hooper.
Watch the skateboarders at the Barbican.