We are living in a world of big data, surrounded by digital devices. The Internet and networks are expanding to places and fields where we wouldn’t expect them to emerge. Have you ever imagined lights on stage being controlled by the emotion flow of the audience? How can we grasp and comprehend this physical yet abstract reality? This session explores the possibilities and success factors in producing interactive theatrical experiences, accessed by the audience using mobile phones. Sander Veenhof is an artist using the city as a virtual platform, bringing alive the virtual world.