Shimrod makes MY point very well!....

But to expand...
"If, on the other hand you are actually no more than the meat-bag that wears your clothes, these things have no ready explanation, or one of really excessive complexity.

Oh they do have various explanations. The simple one is that they are just an variation of what happens in intense, lucid dreams. Brains which are under unusual stresses, like anesthesia or reduction of oxygen near death...etc... can easily have their usual neuron paths disrupted... firing in semi-random ways, but still using patterns already there.
It's not a theory one can directly test, anymore than the ones Amos espouses, but it certainly has no more implied complexity!