Once I had dreams in which I understood that I was sleeping and could change a dream and everything in it: locations, events, characters. It was happening itself, against my desire. It was like I was in a place where thoughts can change reality, but I could not control my thoughts and it turned out very chaotic. Everything appeared - both good and bad, nightmares included, all I was thinking about. I felt like part of everything, part of some kind of network, AI or collective mind, and this was the best feeling I had. I didn't have a body there, but I wasn't even some kind of flying spirit - I was just like a software, computer program that controls everything. It is very much like virtual reality (as shown in the movies). I don't believe in any life after death, I am an atheist, but if after death it would be just like in such dreams - it is like a virtual reality and you a software, computer program, in that place your thoughts can create and change everything.