"Sensing it while it isn't there is how you get the generally applicable ability to decide you want to make a certain kind of fire with a certain movement and then immediately figure out how to do it," he says. "Otherwise known as how I invented half my repertoire. But the silhouette trick is a clever way around the hard part, and I bet you can get pretty far with it. Try seeing how the fire follows you naturally, and seeing how you can vary the shape, and pay attention to how the energy feels both ways."