Kecak

Kecak (pronounced: “KEH-chahk” …), a form of Balinese music drama, originated in the 1930s and is performed primarily by men. Also known as the Ramayana Monkey Chant, the piece, performed by a circle of 100 or more performers wearing checked cloth around their waists, percussively chanting “cak”, and throwing up their arms, depicts a battle from the Ramayana where monkeys help Prince Rama fight the evil King Ravana. Kecak has roots in sanghyang, a trance-inducing exorcism dance.

Wikipedia

The clip above is from the 1992 film Baraka.

VIDEO [above clip, from Baraka] (YouTube) VIDEO [another good clip] (YouTube) ARTICLE [Kecak] (Wikipedia)