In an article in the October 1967 issue of the magazine "Popular Photography", Charlie Reynolds and David Eisendrath, both amateur magicians and professional photographers, claimed to have exposed Serios as a fraud after spending a week-end with him and Eisenbud. Reynolds and Eisendrath said they spotted Serios slipping something into the tube that Serios claimed he needed to help him concentrate. They surmised this was a picture of something that the camera would take an image of, but which Serios would claim came from his mind rather than his hand. Robert Todd Carroll later wrote "after the exposure he remained virtually unheard from for the past 30 years."