It’s somewhat fascinating . . . a bit . . .
to observe the way “hallucination” is thrown around in this topic area.
There’s even the laughable term “group hallucination.”
By definition, hallucination is an idiosyncratic INDIVIDUAL term.
No two hallucinations are identical. And the notion that a group of individuals, much less of a hundred or more people are going to have an essentially identical hallucination is absurdly and outrageously ridiculous at the outset.
To pretend that such a notion is “scientific,” is extremely absurd.
There is one situation in which I can think of in which there is some commonality of "hallucination" and that is in those churches based around the use of DMT (dimethyltryptamine). Such churches (the Santo Daime of South America and New Mexico--for the time being) us DMT as a tea to create a type of religious experience.
If I am not mistaken, such usage of DMT in the U.S. is now legal.
Oh, and BTW, these common hallucinations have a regular incidence of contact with previously mentioned aliens known as "grays"!
See your private mail for an additional note.