In this viral video, the staircase in Stockholm's Odenplan subway station was made to resemble giant piano keys, each producing real sound. The goal was to encourage people to take the stairs rather than ride the escalator. The video claims that 66% more people than normal climbed the stairs instead of taking the escalator.http://freakonomics.blogs.nytimes.com/2009/10/13/who-will-climb-the-piano-stairs/
Piano Stairs Video | 66% Higher Stair Use
The makers of this video state that 66% more people than normal will take the piano stairs over the escalator, but how long until the novelty wears off?