I don't know what Burning Man is. I merely lifted the photo. Hope I didn't step in it.
The Burning Man is....BOSC.
Burning Man - Wikipedia
"The late summer event is described as an experiment in community and art, influenced by ten main principles: radical inclusion, radical self-reliance, radical self-expression, communal effort, civic responsibility, gifting, decommodification, participation, immediacy and leave no trace."