Good luck bringing back anything coherent after 5 hours in hyperspace. Much less establishing two way communication that involves meaningful exchange of solid data.
Also in my mind it kind of begs the question for this thought experiment why not load volunteers up with a giant dose of ayahuasca.
https://therooster.com/b...-dmt-machine-talk-aliensThis is a fun one where a student looked at Erowid DMT reports and did some correlating.
https://realitysandwich....hine-elves-dmt-entities/"But even if nothing lasts and everything is lost, there is still the intrinsic value of the moment. The present moment, ultimately, is more than enough, a gift of grace and unfathomable value, which our friend and lover death paints in stark relief."-Rick Doblin, Ph.D. MAPS President, MAPS Bulletin Vol. XX, No. 1, pg. 2Hyperspace LOVES YOU