their performance reminded me of another kind of marathi song that I have heard in which at a point of time the singer goes on with "ambe jogva de" and the female dancers let their hair down and dance. while that is representing the godess getting into a human..it just kind of clicked in my head of a similar phenomenon of head banging in certain genres that performed. completely different reasons..but if you see a guy head bang and the female dancer dance with her hair let loose without the music.you'll see what I am saying...how similar we humans are :D