The gorilla recently was fascinated with a relatively new tourist attraction while traveling to Sweden. The folks at Volkswagen figured they could alter human behavior to healthier alternatives by making a dreary experience into one that is fun. Among a number of such stunts, regarding the present ploy, they obtained a 66% increase in the use of the stairs as opposed to the escalator next to it. Volkswagen established a group called The Fun Theory that produces a number of these unique public projects. They brought in some designers to convert a set of stairs at a subway station in Stockholm into piano keyboard, such that stepping on each stair generates a different tone. The project was performed in 2009.