speculation is that MJ was such a perfectionist that he was rehearsing for his upcoming tour, to the point of i guess exhaustion, maybe his heart just gave out because of that and other contributing factors.

Even though i was not a huge fan, i loved many of his songs,and i do genuinely feel a great sadness at his passing, to think he was younger than myself, not by much, but i cannot imagine my life being over, far from it, such a shame and a waste of a very talented human being, i don't know whether MJ had his own personal torment or not, or whether he was happy or what,or whether he needed to find peace within himself, but whatever i am certain he would not have wanted to leave earth and his children, yes as a mother myself, it was the first thought to my mind to, what will become of them and how tragic a loss for them.