It is a combination of kinect+processing+websocket installation, which allow you to fly thru the sky of london like a pigeon. Demo of the project can be seen here: http://www.dailymail.co.uk/sciencetech/article-2220137/Flying-air-greatest-ease–Pigeon-simulator-public-chance-explore-cities-above.html While the code is open source and available here: https://github.com/jawj/pigeonsim