I would like to find more groups who study this phenomenon. The various religions have downplayed in official language the role of the beyond natural explanations, yet it is the supernatural or apparent supernatural that draws the faithful or makes the unbeliever believe. The yoga teaching I remember is do not seek these supernatural powers; yet, the phenomenon is so tantalizing. Once witnessed, we yearn to control it and make it happen again. But so far the effects remain ephemeral byproducts or dry statistics. These are the facts so far.
My praise and respect goes to these scientists who can tease consistency out of the unpredictable and emotionally overwrought occurrence.