For any of those phenomenon, something is real, the people involved experienced something. That something could be the effects of brain chemistry imbalance or the touch of the Flying Spaghetti Monster’s noodley appendage, or swamp gas or pan-dimensional comedy show hosts poking fun at us. Until more clear observational data are available, the mind will insist on a story to explain what is experienced and “ghosts, aliens, astral travel, time travel, reincarnations, etc.” are as good as it gets sometimes.