Imagine a situation, where you only have a 5" corridor. A player fighting in that corridor drops to negative hitpoints but receives healing from an ally right behind him in the same round. He is now prone, the enemy thinks he is dead (assuming the enemy did not recognize/understand the healing effect). The enemy now wants to attack the "healer", but the field is blocked, so he can't move there... (see discussion at http://paizo.com/forums/dmtz657m?Occupying-a-Dying-Creatures-Square#4
This situation gets even worse if the prone player is still so weak, that he can't take a single attack again if he wants to stay alive. So he will not stand up and risk an AoO, nor will he try to attack the enemy from his prone position (which is unlikely with -4 to attack) and risk being attacked the next round. But neither his ally, nor the enemy can go on with melee fighting because of the blocked field.
So my question is: how do you (other GMs) rule the situation? Will you let him die? Or do you allow him to feign death? Especially if it wasn't his choice to receive the healing right away in this tactically bad position. (Another possibility would be dragging your friend out of the area, but there are no rules for dragging allies I could find.)
The whole problem would not arise, if the prone character would declare himself helpless, because then positioning on his field would be allowed and as long as the enemy thinks he is dead, he would not get attacked.
Recently, we decided to let him feign death, but there are no rules. We came up with something like this:
The enemy standing above the lying creature would get an immediate AoO whenever the lying creature acts. Even actions that do not provoke AoO would trigger an attack because of the very supreme position of the attacker. The lying creature can only wait and think (and thus concentrate on effects or active effects mentally). Even perception by vision is limited, because the open lids would reveal that he is alive.
The whole thing could be ruled out more, like making a bluff check with a bonus of a believable lie (+5, if the enemy took the player down) and/or the enemy being distracted (+5, if he is still in combat).
What are your suggestions?