psychedelics and meditation will get you there, just put in the effort to do the self inquiry. with some persistence and courage, you'll experience it first hand.
Even though your brain thought it wasn't, you were still embodied, unless you are telling us you were in fact medically dead and still self aware.
Unless you can actually tell someone what's in the next room without ever physically being there or observing it, you're just imagining things. It would be incredibly easy to test in a double blind manner, so if it was a power that someone could actually manifest it'd be reliably demonstrated by now.