'It's nothing'? So Inigo mouths, but Tidus is blinking, wondering for the few seconds after about where it even came from or was about--an incident between Taiki and Inigo? And he wants to ask... but Tidus knows that now isn't the time - not as Inigo speaks on, leaving no room for the subject to be broached.

Well. "Do you know how far you can fly?" If they're moving on, with Inigo stroking their friend, that's a curiosity Tidus has. "I wonder if we can do anything cool next mission with you like this!"

Tidus doesn't know what, but- something cool! It'd be cool!