Oren's confidence hurts his defense in the game, but it strengthens his defense at dinner.
Oren has confidence in his and his team's abilities. That's because he knows that his team has good and the opposing team is not as good as they are. So he trusts that he will win the game.
However, this confidence harms his performance in the game, as when trying to make a defense, he acts incorrectly. However, at dinnertime when a disc is going to hit his grandfather, he is confident that he can defend, and that makes him save his grandfather.
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