Slacklining originated in Yosemite National Park, where rock climbers walked on chains between posts for fun as a balancing trick. It is now a popular sport that has evolved into a popular form of gym equipment as well as a fun way to pass the time when camping. Simply put, it is similar to tight rope walking but is almost always placed close to the ground and the line itself is 'slack'. To a casual observer, a slackline looks like a springy rope, but in reality it is flexible nylon webbing set between two ropes. Usually pulled tight between the two anchors, the webbing stretches when stepped upon, providing a fun and safe way to enhance balancing skills and perform tricks.