And here I thought I was the only one who also has had "hallucinations" purely by being convinced they are happening... I guess I'm more or less delusional than I thought. :P
So glad you & your son are spending time communicating about his problems. He seems to be at a very strong point in his clarity if he is able to vocalize the processes that go on when he is having an episode. That's not only a very important part of his recovery, but also your relationship with him.
: ) Keep it up, both of you! Even though you don't quite understand, keep this in mind-- You can only understand the inner workings of insanity as much as he can understand the inner workings of sanity. We can both think about the same thing, but we have very different strategies of getting from point A to point B. And a lot of the time, we don't get to point B at all! Sometimes we pass it up to get to point K. Hahahaha