The most side surfs on a slackline in one minute is 138 and was achieved by Andrew Lewis (USA) on the set on Lo Show Dei Record, in Milan, Italy, on 16 March 2011.

The slackline was 5 cm wide and was 2 m from the floor. Slacklining is a balance sport that uses nylon webbing tensioned between two anchor points. Slacklining is distinct from tightrope walking in that the line is not held rigidly taut (although it is still under some tension); it is instead dynamic, stretching and bouncing like a long and narrow trampoline. The line’s tension can be adjusted to suit the user and different types of dynamic webbing can be used to achieve a variety of feats. The line itself is flat, due to the nature of webbing, thus keeping the slacker’s footing from rolling as would be the case with an ordinary rope. The dynamic nature of the line allows for impressive tricks and stunts.