Floating Stones on Window

http://www.youtube.com/watch?v=ByFvFcf8eM8

Here, I was trying to create a juxtaposition with the city and the floating stones.
Even the colours provide a stark difference to both environments.
I wanted to achieve an alternative way to suggest the comparison of the stones and the city. I think by projecting the moving image on the static window, it creates a frame within the frame and allows the viewer to focus on both simultaneously, though within their own frames.