I gave this link earlier in the thread
http://www.ghoststudy.com/gallery.htmlThe site has supposed photos of real ghosts and ghost like appearances. One of the more popular photo subjects are these things called "orbs." Essentially they look just like the orbs in HMs photo, glowing balls of light. The guys running this site are convinced that they are true orbs and not dust particles or what they call "lense crashes." I do notice that whenever these photos are taken, they are taken during times of poor lighting, in and outdoor setting, or poor photo lighting (overexposure, over flash), or when shooting something where there might be glass, a mirror, or something equally reflective in the room. Light and lenses are goofy and has a strange way reacting to stray light sources and the reflectivity of the lense itself. I have had dust inside my lense element show up on film during certain types of lighting situations.