Could have been a zetsu recording the fight
Could have been a zetsu recording the fight
The genjutsu began or was dispelled
no notice his eyes were actually in a "keen" shape, as if he was trying hard to see something or noticed something.It wasn't a person. It was a general note of surprise, likely him realizing his injury [he fell directly after].
Many speculate is was him falling out of Genjutsu, which is how Madara survived.
Zetsu was after thisCould have been a zetsu recording the fight