Tidus is giving it more time before any concern than the tiny tiny thread of it that exists in him finds itself troubling him. He knows that shuttlecock wasn't hard, knows it wouldn't have caused the other guy to perish even at being hit with it in the middle of the game.

And then--and then in the same second that Tidus might be reconsidering his position in this room to be more aligned with Taiki's.

He speaks.

And Tidus is wholly unimpressed.

"I'll throw you overboard one day and you can find out," he flatly replies.