Both the stage and the psychologist who use hypnotism are specialists but I understand what you mean. I don't know that I can be hypnotised. My doctor tried it once and was furious with me because he said I wasn't taking it seriously. I was but it was just not happening. I have read about people under hypnotic regression talking in various languages. Some of the documented occurrences are mind blowing. It begs the question...have these individuals been alive before or could they be soaking up some kind of energy force that is being emitted from an alternative self that exists in another dimension. There are books and theories published and I suspect still to be written that would support this.
I'm sure abduction is going on. Given the statistics life must be plentiful in the universe, from simple bacteria to advance beings that are way beyond our intelligence or technological knowledge. If I was an alien looking in on an inferior species I would go down the route of abduction. We humans do it already. We take specimens from the wild all the time. Some are dissected and others are weighed, tagged and released but we take samples of everything...hair, skin, blood and the list goes on.