Netherlands-based Studio Roosegaarde managed to put hundreds of computer fans to good use by creating Flow 5.0. This interactive installation "dynamically adjusts the speed and direction of the fans according to visitors' movements." Video after the break. Click here for first picture in gallery.
The installation was constructed as two 10-meter-long walls which immerse visitors in the center of the artwork (and gives them a nice cool breeze while they're at it)[via Technabob]