I haven't experienced one either, but I have heard from some extremely intelligent and level-headed people that you can access beings from other realms if you meditate (a lot) or take high dose psychedelics. These are not hallucinations, unless you agree that everything is a hallucination (which it is!). Science is finally coming around to the idea that the universe is created through the mind, and at different frequencies of consciousness, an infinite variety of worlds open up.
