3D Photography

I like to make the unseen and un-noticed visible. I have been taking 3D pictures for years, but I just started something new: time exposure.
The picture above is a set for viewing as 3D. The left two images can be viewed by the cross-eyed method, or the right two images can be viewed by the wall-eyed method, like those "Magic Eye" books. (The center image is in both of thse pairs.)
For the cross eyed method, look at the left two pictures, and start to cross your eyes. When they cross just the right amount, your eyes may try to lock on where elements are the same in the two pictures. That is the right amount. Now stare for a while, and your eyes should focus. Once they do, you will see the image in 3D. Part of the fire actually comes out of the screen a little.
This was a 1 second exposure, taken with a pair of Canon A80 cameras mounted on a board about 6 inches apart. The cameras were tripped manually at the same time. I am surprised it worked so well.
The subjects were fire dancing. They spin small pots of fuel around at high speed with twists and create 3D sculptures of fire in the air. This was taken outside Gallery 5 in Richmond, Virginia, at this group's monthly performance. They call themselves River City Burners:
http://www.rivercityburners.com/index.html