I don't get how Martin landed on his back after being shot.
Anyone want to speculate?
Ravi, I answered that in some detail in one of these threads; I forget which. The short answer is, he could have fallen either way, depending on which way he was leaning when the bullet hit, neuromuscular effect of the bullet impact (which is highly variable), and other factors. (I had understood Martin fell face down). A person hit by a bullet does not necessarily fall either in the direction of the shot, or away from it. The autopsy findings should enable an accurate reconstruction of the relative positions of Zimmerman and Martin at the moment the shot was fired, in any event.