This is the machine that creates the giant smoke rings!
I believe that it throws a large amount of fuel (probably gasoline) that is ignited in the air.
The fuel is propelled using compressed natural gas, and the fuel is ignited just when it exits the vertical pipe (using a propane torch).
The burning fuel creates a vortex, making a large black smoke ring in the sky.
Photo taken at the Burning Man 2005 festival (Black Rock Desert, Nevada).
Burning Man Festival
Burning Man is yearly gathering of about 70,000 people, many from the San Francisco Bay Area, celebrating love, life, passion and art during one week in a desolated desert in Nevada.
The event takes place each last week of august in an immense dry lakebed called Black Rock Desert. A temporary city is built where about everything is permitted except violence, money and commerce.
The culmination of the event is the burning of a large human-shape figure in a giant bonfire, hence the name (Burning Man). The city disappears completely at the end of the week, leaving no trace.
If this sounds interesting, check out the official Burning Man website at www.burningman.org.
Burning Man 2005 photos by Tristan Savatier.
For information on this festival and to see my photos from other years, click here.