The Kecak dance is one of the most famous of Balinese dances. It is unusual because it has no musical accompaniment like many other Indonesian dances do, the rhythm of the dance is produced by the chanting 'monkey' chorus. Instead, a troupe of over 150 bare-chested men serve as the chorus, making a wondrous cacophony of synchronized "chak-achak-achak" clicking sounds while swaying their bodies and waving their hands .From that chanting noise of "Cak-cak-cak", then it gave the dance its name Kecak.