The human brain does apparently have amazing abilities. Who would have thought a person could fly a helicopter using only their thoughts, or that a rat could press a lever to receive water using only its mind? All of these things certainly seem unbelievable or almost magical to me (and probably to most people), and yet we have explanations for them. We made them happen by manipulating the brain. In fact, what weve learned from studies just like this is that our imaginations and our physical brains are intertwined and almost indistinguishable from each other. In other words, thinking about an action in our mind is practically the same thing as taking that action, according to our brains. Another example would be that if you imagine playing a piece on the piano without actually playing it and practice the piece in your mind, you can teach your brain and thereby your fingers (your motor cortex) how to play the piece. This works almost as well as actually physically playing the piece over and over. Amazing, right?
Maybe your friend pieced together their vision of your room from knowing you, knowing what youre like, what your hobbies are, from references you may have made to your room in regular conversation, etc. Or maybe she didnt describe it perfectly but you were so impressed she could describe anything at all you just overlooked the discrepancies. Maybe its like when you sit down with a psychic (or whatever they call themselves) and throw a whole bunch of names at you that youve never heard before, but then s/he gives you the name of your dead grandmother and some other somewhat accurate details about her and suddenly you forget about all the stuff she got wrong!
Maybe when you thought you were travelling to other places or saw Krishna, you were dreaming. I travelled somewhere Id never physically been before with my dead father once I thought and felt like I was actually there with him. I could feel him, smell him, touch him. That is, until I woke up. Dreams can be very powerful experiences and theyre definitely something we havent quite got figured out yet.
Maybe the guy you cursed was going to get sick anyway, and it just coincided with you putting a curse on him. Or maybe just the thought that you he knew you wanted to hurt him was enough to convince his brain that he was ill. To me, the thing about this is, if curses or spells or whatever were real things, people would be dropping dead all over the place for no apparent reason whatsoever. Wouldnt somebody put a curse on Hitler, or Osama Bin Laden or any random bad person you can think of? Or if you could put a magic circle around loved ones, then why are kids still dying from cancer or being molested by pedophiles? Why do children suffer at all?
I dont want to tell you that you didnt actually have these experiences, because Im inclined to take your word for it. And they sound pretty fantastic. How we interpret our experiences compared to what actually happened though, are different things. I dont know that we can just say, well I dont have an explanation for it, so I must have been leaving my physical body, for lack of a better explanation. Especially in light of what we do actually know about the human brain.
Just my two cents.