Photo by Andrew Kufahl
This is probably one of my favorite "trick shots" that I've done with long exposure techniques. The picture on the stairs is a picture of me, but the picture actually doesn't exist. No, I didn't photoshop myself onto that picture, I was actually standing/squatting just in front of the stairs. When the shutter opened, I manually fired the flash (which was gridded to only illuminate me), which then superimposed me onto the black piece of foam core that is on that picture frame. Then I quickly got out of the shot, and let the ambient light burn in the rest of the scene for the next 30 seconds. So it really is a single-take image, carefully engineered to take advantage of how darks and lights render when mixing flash with ambient light.