I love the ghost-like images that can be made using pinhole cameras. The long exposure time allows you to create this by standing in front of the camera for part of the time taken for the exposure, depending on how solid you want the person to look, and then after that amount of time just stepping out of the frame and allowing the exposure to finish. I've already tried to do one practice picture like this, I'm not sure how it will turn out but I am hoping for the best and I can't wait to try some more.