It happens when the sightings are emotional. For instance:
The Colorado Mystery Drones Weren’t Real
The mysterious drone sightings that captured national attention were a classic case of mass hysteria.
https://www.vice.com/en_us/article/884xv3/the-colorado-myste...
Flip side of same phenomenon is the "snappier" meme.
It happens when the sightings are emotional. For instance:
The Colorado Mystery Drones Weren’t Real
The mysterious drone sightings that captured national attention were a classic case of mass hysteria.
https://www.vice.com/en_us/article/884xv3/the-colorado-myste...
Flip side of same phenomenon is the "snappier" meme.