That's fantastic! I'm eager to try a tank myself, but the nearest place is about 3 hours away. Maybe this summer I will take a weekend drive to try it out.

Generally, i think all of these experiences are based on the same thing. DMT. Deep meditation allows (i believe) for endogenous dmt release. When this happens, we experience 'trips' similar to NDEs, OBEs, or ayahuasca or dmt trips. The use of deprivation tanks or binaural beats are simply methods to separate ourselves from any and all distractions so we can really focus on deep meditation (which is necessary to get that dmt release).

All of this is simply my belief, as there presently has been no proof one way or another. I'm studying these things myself now, and hopefully in a few years or so once I obtain my PhD I'll be able to study these things more specifically and maybe even find the proof!