There are two types of people who seem to do slacklining, a practice in balance that typically uses nylon or polyester webbing tensioned between two anchor points: those who fall off immediately upon stepping onto the line and the professionals who treat the line more like a trampoline than a piece of string. A booth devoted to the activity has been set up near the Stoned Circle, and Fuji Rock fans are invited to try it out for themelves at various heights. If you’re lucky, you may be able to time your visit so that it coincides with a slacklining demonstration by the experts (every day 14:30-15:00). Fun fact: people who do slacklining are called “slackers,” so be sure to take full advantage of it…