Highlining is a branch of slackline that is practiced at great heights, between mountains, buildings, bridges or whatever. It is a great challenge and a kind of slackline in which the mental and mindset are far more important than the technical and physical ability.
This form of slackline provides an incredible adrenaline rush and also has a great impact on the viewer as well. With the exception of freesolo, where the athlete is purposely unsafe, the highliner is permanently secured by a harness, attached to the main slackline line and, at the same time, to a lifeline, slackline webbing or rope. This sub-modality, where high risks are involved and accidents are potentially fatal, should be practiced according to strict safety criteria, without giving rise to chance. Note: Accidente already happened and the are reports of highlining deaths.