When we arrived, it was explained to the group by the leaders, that Levitation Photography is actually a popular cult technique that students and photographers are playing with. Google it and you'll see all kinds of images others have come up with - you'll even find several You Tube videos telling you how to attempt it. Or, go here to see more.
The second method requires a tripod, several exposures and some photoshop expertise, by merging layers of the scene before the model steps into it and after. A large group of us broke into two smaller groups and experimented with both methods. The experience was fun!