The article discusses the origins of several extreme sports. Parkour originated in France and was developed by people who found traditional gymnastics too dull. Its practitioners aimed to navigate through obstacles in urban environments as efficiently as possible. BASE jumping traces its origins to parachuting in the 1950s. It grew out of skydiving and held its first international championships in 1982. Motocross began on muddy tracks in Europe and Australia before making its way to the international stage. It was popularized in the US by a TV program focused on motorcycle racing.