This is probably the point where Inigo should be responsible and cut Tidus off.

For a myriad of reasons, really. Partially since this is all happening on Inigo's ticket. Partially because even though the train doesn't seem to punish them in any way, he really doesn't want Tidus to be the first person to end up that way for just going a little bit too far.

But it's so hard. Because the other is spirited, and.. it's really hard to mind anything else, as long as Tidus is right there with all of his energy, now being the one to wildly swing Inigo's arm around like he's directing an invisible orchestra.

"Who knows what he'll do next?! He's unpredictable!" Inigo may be using his free hand to wiggle his fingers a little as he says that.

For that little extra effect.

"Maybe we've found the one person who can knock down your engine wall!" With sheer force of will alone.