Thoughts on Hell?

[Crossless2.0]

My money is on seizure.  

Probably temporal lobe epilepsy.  Check out the various phenomena listed in the section "simple partial seizures."

Yep.

Now couple an experience like that with a demonstrated tendency toward religious fanaticism -- assuming, of course, that 'Paul' can be taken at his word regarding his background and his activities prior to the conversion event.

Nothing miraculous to be seen, and certainly nothing suggesting a foreshadowing of 20th Century physics. 

Of course, we're dealing with another religious fanatic here, so I don't expect anything as mundane as a reasonable explanation for anything to persuade him. The Huggys of the world don't seem to find reality to be very interesting.