Skateboarding is a creative response to the urban environment. Through the eyes of a skateboarder, the city becomes an endless playground of obstacles limited only by your skill and creativity. Fear is the greatest barrier to overcome and the boundaries of the possible are continually redrawn as skaters try harder tricks, down bigger obstacles, at faster speeds. Banal architecture is transformed into a concrete canvas for physical expression. Skateboarding is an art of movement and the culture of the sport purveys the idea that all the world is a stage for your art. The public space is used to exhibit the skill and creativity of the skater in response to the environment he is placed in. This idea is prevalent in other underground cultures, most notably by graffiti writers, who view the city as public gallery for their work.