Slackwire Acrobatics Jeune chinois effectuant des numeros d'equilibre sur un fil A Chinese acrobat performs amazing balancing acts on a slackwire at Le Plus Grand Cabaret Du Monde Slackwire is when the tension on the wire is only provided by the load, i.e. the performer and props. The difference is that to balance on a tight wire the performer must keep his centre of mass above his feet, while on a slack wire he moves the wire with his balance to under his centre of mass