Well, the reason I said that is that I've had really long projections (three hours once) in which I kept coming back and going out again, and got to the point in which I was conscious in my body but unable to wake up or move, and I had to be woken up and it took a long time for me to 'come back to life.' So if this had happened to me for long enough and there would have been no one to wake me I would have gotten weak enough to die of dehydration or something similar.