Watch the last scene in Avatar when the humans are lined up being forced to board the plane. When the narrator says that "a few humans were selected to stay," it shows the two scientists standing there. (The chunky hindu looking one, and the tall skinny one that has his own avatar.) Then as the camera pans through the shot, the tall scientist's avatar is standing further down the line holding a gun! How can his Avatar be there holding a gun if he isn't in his chamber?