Types of Sightings

Close Encounters of the First Kind: UFO's are witnessed at close quarters
Close Encounters of the Second Kind: UFO's cause physical effects on humans, animals and objects
Close Encounters of the Third Kind: Entities are seen in or near UFO's
Close Encounters of the Fourth Kind: UFO's abduct humans
Close Encounters of the Fifth Kind: Humans contact UFO's by conventional signals or telepathy