Yugi in “Unfinished Business”

[thinking] What is happening to me? One minute I'm battling against Kaiba, the next minute I'm battling with myself. Suddenly there was this other presence inside of me, willing to do anything to win the duel. And it took everything I had just to hold him back. But that gave Kaiba the opening he needed. I let Kaiba win the match, but I had no choice. That other presence may have seriously hurt Kaiba if I hadn't regained control. And now I'm afraid of what happens next time. What happens if I can't control it? No! I can't take that chance. And that means:I can never duel again.