Let me start off by saying this was not an NDE but may be of some interest. I really cannot say if this was a dream or not but out of all the dreams I have had this one was remarkable.
I lost my father in 1990. He was in a coma for about three months after a heart attack and never recovered. We were very close and his death was very traumatic for me. I remember lying on the couch at night and the next thing I knew I was out of my body. It was completely dark. I could not see a thing but I knew I was out of my body. I tried to look at my hands but I could see nothing. I tried to put them up real close to what I thought were my eyes but I could not see anything.
I kept hearing a faint, firm but kind voice said, "What are you doing? You're not supposed to be here." I knew I was hovering over my body, parallel to it and only about a foot and a half away. I was in a state of confusion on how I got there. I tried very hard to get back into my body and with each attempt I became more frightened. After many attempts I became very tired and surrendered to the idea that I may be stuck here in the dark forever. As soon as I surrendered I was back in my body. I awoke very shaken but very thankful I made it back into my body. I question whether it was a very weird dream or if others going through grief have similar experiences.