A medium-sized creature occupies one square when it stands. But what about when it's lying on the floor?
We had a troll with a reach of two squares that had just beaten my paladin (who was directly next to it). One of the other players said that since I was now lying on the floor, my PC occupies two squares and he can easily pull me away from the troll without granting an opportunity attack to the troll.
Is there any support for this in the manual?