Greg, I have just read your fascinating experience and I think you have done an excellent job of the drawing.
I wanted to comment because when I first saw your drawing it seemed to trigger a split-second feeling of familiarity, like I had seen something very similar before. I can't put my finger on it exactly. Maybe I have seen it or something like it on t.v or in a movie, but the memory does seem to be more profound than that. I did experience the start of a spontaneous OBE a couple of months back and for some reason it made me think of that even though I didn't see any tunnels or the like during the experience. Weird!
Thanks for sharing