Characters such as "Jack Brown" [supposedly a UFO investigator] have been annoying and frightening people for centuries. In earlier ages they were associated with the occult or with religious experience … the "dark men" of countless traditions. Today they are a part of the UFO mythos. They arrive after a UFO or fortean event, sometimes afoot, sometimes driving automobiles that appear new even if the vehicle is clearly many years old. […] They ask strange questions and make outlandish observations, or they simply follow from place to place.