The Temascal consists of a group of people entering the dome you see in the background then the rocks are brought in and placed in the center. Then a Chaman (Shaman) in this case Aleph, will douse the rocks with a ceremonial water. And brother it is hot!
There are eighty rocks used in a Temascal. So how it normally works is that twenty rocks will be brought in and steamed until they start to cool and then twenty more rocks from the fire will be brought in and so on.
I just like the way that fire dances.