Sighting of which were collected evidence showing the passage of a UFO or extraterrestrial life: impressions, radiation and circles in the camps are the most obvious examples.
Sighting na kung saan ay tinipon ebidensiya na nagpapakita ng pagdaan ng isang UFO o extraterrestrial buhay: impression, radiation at circles sa kampo ay ang pinaka-malinaw na mga halimbawa.