We are standing on a viewing platform next to the Perrine Bridge, one of the ten highest bridges in the United States. It soars nearly 500 feet over the Snake River Canyon, just outside of Twin Falls, Idaho. I wanted to make an image with maximum tension. Using my long 250mm telepoto lens lens, I spotted a distant boat closing fast. I caught it just as it swept below me, sliding easily between the opposite shores of the river at its narrowest point. I loved the pattern created in its wake -- the river looked as if a filleted fish has been imprinted upon it. The most critical portion of this image, however, is the distance between the boat itself and the edges of land. This space is called Negative Space. The shorter the spacing between the boat itself and the sides of the river, the greater the tension becomes. Tension is the sense of being stretched almost to the breaking point, and while there seems to be plenty of clearance for this boat, the illusion of "threading the needle" is still present, an illusion which draws the eye and holds it.