Comas, and the human unconsciousness remain one of the great unknowns. Where can we look for deep answers? Science? Philosophy?

No, as always, the answer is 'Demolition Man'

Demolition Man depicted a world in which criminals were put into an artificial coma and then rehabilitated subconsciously.
Wesley Snipes then broke out and killed a whole load of people, and Sylvester Stallone had to be defrosted to deal with him.
All kinds of chaos, fighting and explosions followed, before the film ended when Sylvester Stallone kicked Wesley Snipes' frozen head off.

So much for any answers. If only real life was as exciting as Demolition Man!
I would immediately ask to be put into a coma and my subconscious manipulated to experience the best coma: when you are living in a world that is built out of chocolate brownies, but you never have to brush your teeth!

WOW!