"It's never come on before, huh? Why do you think that is?" But as soon as he asks that, another question makes him visibly confused. "How did it know we'd need them?"

It's one thought that leads into another, the latter that makes Tidus look at his own around his wrist, the light of the island sun glaring off its screen until he changes the angle.

Did someone say something? How? Did something else happen he didn't hear about?