There's lots of speculations about that aspect. Some contend that a kind of wave or frequency is broadcast which causes certain emotional, passive etc. mental responses in near enough humans. Others postulate a kind of spiritual fog or suppression occurring. Some think the anti-grav propulsion itself has some such effects.
Eventually, God will likely reveal all such. I doubt the puppet masters will!
I think the second that I said to my mother "Do you see what I see," we really should have panicked. What followed was just about the most relaxed and natural time.
I only snapped out of it (and I should not even call it that) when I saw the back of the cylinder and became apprehensive that "they" knew I had somehow seen them.
I still don't know what it all means, and have set myself up for ridicule and scrutiny on other subjects in future on this forum.