QUOTE
When I astral project, there is no cord. In fact I am not aware of my physical body. My body has been slapped, punched, pinched, etc and that did not even register to me while I was projecting. My perception of time is skewed, so I spent what seemed like to me a short time in astral mode, but in actuality was about two days. My family freaked. It was like I was asleep, but they could not really wake me up. What was even creepier is that I often sleep with my eyes open. The same thing happens when I am projecting my consciousness away from myself when I am remote viewing, or scanning a person or an object, or managing mental links anf backtracking. It is as if I lose all connection to my physical body. I am no longer aware of what is going on.
Like wise
Astral projection is like meditating while you're holding your breath. It requires focus and you can only do it for so long. The human consciousness is capable of controlling the body to a point. When the body is in imminent danger, like you hold your breath long enough, the primal mind takes over and forces the body to breath. Likewise if you breath too fast too long you can cause yourself to passout, yet another mechanism to ensure the body's survival.
Of course it is entirely possible to circumvent these functions. For holding the breath it is possible to practice at it and be able to hold it longer, still only to a point. In the case of astral projection one might use certain drugs that increase one's ability to remain on the astral plains and its possible to die while there. But death from AP is rarely caused by a person willing themselves away from their body, I'm don't think its impossible. The thing is if people astral project naturally, much as we dream, then people would be more prone to just wander off and more deaths would attributed to such dream like states. Dying in one's sleep happens very rarely. Usually its an external cause like an ulcer, heart attack, OD or accident. Its also possible to be frightened to death while AP. But there is still that natural mechinism that for the most part holds people in check.