Uh, yes, it is. The entire game, as far as determining down and distance, is based on the position of the ball, not the person carrying it. "Breaking the plane" is a TD because if the ball were to be spotted for the next down, it would be in the end zone; same reason why the entire ball has to be out of the end zone to avoid a safety.
“Uh, yes, it is. The entire game, as far as determining down and distance, is based on the position of the ball, not the person carrying it.”
Unless it’s in the back of the end zone, in which case the ball doesn’t have to break the plane in the field of play at all. Furthermore, even if it does, and the player doesn’t maintain control of the ball all the way to the ground, it’s ruled incomplete. I agree with the guy who said the ‘breaking the plane’ rule is stupid, and wildly inconsistent!