Man in the mirror
Do you know the Eyexplore channel on YouTube? They have a lot of good stuff there and I checked out one of their ideas, to use a reflective surface to capture a mirror image of someone walking past. It seemed to work quite well. However, I might need to go back and work on the technique, in particular placement of the camera for a better image, a little more.
If you want to see the Eyexplore channel, you can see it here.