The Kecak Dance also known as the Ramayana Monkey Chant is a dance in Bali that sort of reenacts the battle from the Ramayana. This is where the the monkey Vanara helps the Prince Rama fight the evil King Ravana. These performers are surrounded by probably 50 or more male dancers that wave their hands up chanting 'chak.' I think they sort of represent fire.
Taking a photo like this was not easy. I had my Canon 5Dmkii and the 70-200mm f2.8L IS II. The IS came in handy because after the sunset it got very dark so I needed to slow down my shutter slightly. You'll notice some of the motion blur. Other then that, I just had a great spot in the front row and fired away in bursts at a time when something interesting would happen. When shooting like this is when you really see the weakness of the 5Dmkii compared to a 7D or the 5Dmkiii. The burst speed is just slower and the auto focus isn't all that great. But I still got a couple good ones so I'm happy. No need to upgrade my camera yet!
To process this photo I only used a few of my presets from Lightroom and Photoshop for the final sharpening.
There is a little bit more about the Kecak Dance on Wikipedia but not much.