Explanation of categories of close encounters
Close Encounters of the 1st Kind – CE1K
Visual sightings of an unidentified flying object
Close Encounters of the 2nd Kind – CE2K
A UFO event in which a physical effect is alleged; this can be interference in the functioning of a vehicle or electronic device, animals reacting, a physiological effect such as paralysis or heat and discomfort in the witness, or some physical trace like impressions in the ground, scorched or otherwise affected vegetation, or a chemical trace
Close Encounters of the 3rd Kind – CE3K
UFO encounters in which an animated entity is present—these include humanoids, robots, and humans who seem to be occupants or pilots of a UFO
Close Encounters of the 4th Kind – CE4K
A Close Encounter of the Fourth Kind is a UFO event in which a human is abducted by a UFO or its occupants.
Close Encounters of the 5th Kind – CE5K
A Close Encounter of the Fifth Kind is a UFO event that involves direct communication between aliens and humans.
