A few months ago I had the chance to see this beautiful installation by Martin Hesselmeier and we talked about his installation and the things unseen made visible for more than one hour.
look at his overview on saroskop and his further work -> link
His installation is a nice thing, it generates its own choreography of sound and movement and balances symmetry and chaos. Even more impressing was as visitors recognised their impulse with their mobile phone on this installation how they immediately started o interact with it. A mobile service provider would never generate such and instantaneously interaction but the would like to achieve it.
People who never met before were asking each other for their mobile phone number just for the purpose to send out a signal to someone. but not to send a message, no to drive a third thing in the room, the saroskop.