Attendees of the Vancouver Olympics can manipulate the lighting on Torontos CN Tower using their mind.
In 2007, the tallest freestanding structure in the Western hemisphere was outfitted with an computer-controlled LED illumination system capable of producing 16.7 million colors. Each LED fixture can be individually programmed, allowing for an endless variety of visual effects.
At the Ontario Pavilion in Vancouver, participants can control the towers lighting by means of electrodes monitoring their brainwaves.
The lighting is controlled by two types of brain wave. Alpha waves achieved by relaxation bring the lights on the CN Tower closer to the observation deck, and beta waves achieved by concentration cause the lights to spread out and flicker so they appear to be spinning quickly around the tower.
Image courtesy of La Tour CN.