>Great article. I recall a friend's experience with a Polaroid picture >he took at a party in a house that was thought to be haunted. There was >a stranger "who wasn't at the party" in a photo of a group of people. He >looked kind of transparent like a double-exposure. Nobody could figure >out how it happened. The camera wasn't able to make double exposures. >Is there a "trick" specific to Polaroid materials that allows ghost-like >artifacts? Alan, As far as I know there is nothing special about Polaroid cameras that enables them to make ghost-like artifacts. Unless, of course, someone is purposefully trying to deceive an audience (as has been done). I'd think (sometimes incorrectly!) that the solution to the apparition would have to be found in the manner in which the photograph was taken ... assuming that truly the camera was incapable of double exposures. There is also the phenomenon of "group amnesia" as to what happened. This sometimes is induced by indiscriminate magneto-encephalographic wave transmissions emitted by transient intergalactic force fields resulting from matter-antimatter interactions. Andy