"It is Allah that takes the souls (of men) at death; and those that die not (He takes) during their sleep: those on whom He has passed the decree of death, He keeps back (from returning to life), but the rest He sends (to their bodies) for a term appointed verily in this are Signs for those who reflect."
Az-Zumar 39:42 - Translation of the Qur-an by Yusuf Ali
So, the most amazing thing for him is that, even when his body was not functioning, and his whole brain is totally 'switched off', 'something' was experiencing what he related. It's definitely not the body, neither was it the mind. There can only be one thing left. It's the soul that is experiencing all that. There is a soul. That soul is the real us.
Science intrigues me. Another book I've read explained about our senses, i.e. the mechanics of seeing and hearing, feeling. Seriously it's technical, how light waves and sound waves gets converted into energy and is processed in our brains. The interesting question is, so our body is a tool for our senses - then who are what, is the body processing those information for? Who is the ultimate user of all those information? The answer again is, the soul.
This soul that will be accounted, for all our words, actions and feelings. This soul is an abstract thing. Nobody knows the true nature of a soul. Like is it made of of any matter in this universe? Nobody has actually been able to identify or find a soul physically. So when I say I, I'm actually referring to my soul. This soul that can leave the body or return to the body, by Allah's will. This soul that I believe experience our dreams.
And as for the doctor, and all of us.
And say: “All praise is due to God! In time He will make you see [the truth of] His messages, and then you shall know them [for what they are].” And thy Sustainer is not unmindful of whatever you all may do.
~ An-Naml 27:93 - Translation of the Qur-an by Asad