It is interesting. I was in hospital pumped up with all kinds of medicine and I saw from the window how the whole hospital building took off flying. And I "knew

It is interesting. I was in hospital pumped up with all kinds of medicine and I saw from the window how the whole hospital building took off flying. And I "knew" it was real, I knew it could not be a dream. So I wondered afterwards why did it feel so real, unlike any ordinary dream? I think it may be because I remembered that dream so vividly and it was a dream where I was fully conscious about my experience, and was able to question it rationally, and that didn't stop the dream from happening. Whereas in ordinary dreams we just experience the dream, we don't much experience ourselves experiencing it. And seems like if we ask in a dream is this a dream the dream is over soon enough. Seems some drugs can cause us to "dream" in a way that does not immediately break when you start questioning it. And why couldn't they.