What happened to me and those others happened in different places in the house, at different times, and in different ways. That would tend to rule out mental illness, because we would all have to be having the same illness resulting in seeing and experiencing the same things together. It was Southern California, so extreme weather was not a factor.
I'm aware that certain electromagnetic emissions can cause the brain to feel certain ways, to feel a presence that isn't there, perhaps even see things. Again, what happened to us happened in different areas of the house, at different times. If a bad circuit somewhere in the walls was messing with our brains, it would have tended to happen in one area, not throughout the house, front and back yards. The nighttime incidents were unlikely to be sleep paralysis because the people who saw things standing besides their beds often managed to get up, walk around the bed, and approach the thing before it vanished. There's also the fact that people would see similar things in the day time while wide awake. We ate different things at different times, so moldy bread couldn't have been the cause, nor drugs or drinking, because I at the very least didn't indulge in those things.
Occasionally the blender on the kitchen counter would start all by itself, spinning away on puree, without the benefit of being plugged in. This happened at least four different times. The two women in the house insisted countertop appliances be unplugged when not in use. When the thing started, there were anywhere from 1 to 4 people in the kitchen. It wasn't a brief little whirr. It would stay on for nearly 2 minutes. I, like the others that experienced it, took the time to make sure it was in fact unplugged. When it happened to me, i took the time to follow the plug, make sure it wasn't jacked into the wall, then I kept pushing the off button. It didn't respond, It just kept buzzing away.
It would go on far too long to be the result of a build up of static electricity. If it were a result of a short circuit, then why would it work normally when it was plugged in?
I am not someone who simply excepts the most supernatural explanation for things, not right off the bat. I was careful the entire time to remember the circumstances of it all, then try to eliminate every plausible, normal explanation I could think of. Things like this are exceedingly rare; I never experienced things like it again. But I know they do happen.
Science is the best tool we have to explore and understand the physical world. Religion is the best tool we have to explore and understand the spiritual and moral world. It is silly to throw away the one tool because it isn't useful in dealing with a problem it was never meant to address. Science is invaluable. Modern society can't exist without it. But it can not tell you if an action is moral or immoral. It can not tell you good from evil. And it can not help people understand things that exist beyond the physical.
Like I said, I don't actually expect you to believe me. What I do hope is that you eventually understand is that science, pure reason backed by testing the physical environment, can not tell you everything there is to know. It is a very important tool, but a tool that only fixes certain problems, not all problems.