Hey this is a weird subject but have any of you ever thought about what causes it, if it is indeed real? I have a theory but it may be totally wrong as I don't have a background in physics or chemistry. Well I read about solar neutrinos and how they pass through our bodies all the time. They rarely interact with matter at all and underground detectors can pick up their presense when one hits the cholorine atoms in them. I also read when a neutrino strikes a proton it converts it to a neutron. So I was wondering is it possible for a solar neutrino to hit a molecule in our bodies and start some kind of chain reaction or release a sudden burst of energy to start one? I know they put cholorine in our tap water to clean it so maybe every once in a while a neutrino collides with a chlorine atom in our bodies and releases energy. It would explain the rarity of the phenomenon if it was true.