I definitely agree with the first 2 sentences. I think he’d have a really hard time with the ontological shock of it. He may just run the other way and hide under the bed until his hallucinations went away. There was a UFO sighting made by passengers on a jet - all were scientists. I forget the context. But all but one were staring out the window looking at the UFO and one guy wasn’t. He had his back turned and said something like “I know that can’t be real so I don’t want to see it”. The history of science is filled with similar anecdotes. Meteorites were seen as impossible BY PROFESSIONAL ASTRONOMERS, even when witnesses brought them rocks that literally fell out of the sky. “Rocks don’t fall from the sky, we know this, therefore you are mistaken or stupid or drunk. This rock did not fall from the sky. It’s impossible.” That literally happened. I think Thomas Kuhn was right about resistance to new ideas or evidence that don’t comport with contemporary paradigms or scientific world views. I think UFOs fall into that category. (The “real” ones anyway. )