Tidus remembers the Halloween candy incident. Tidus remembers ... basically any time that Inigo has abruptly jumped him, like today. And there's surely countless other incidents that cannot be titled right now, but Tidus knows. He recalls. Deep in his bones, every time that Inigo has gone after him over the equivalent of one piece of candy.

So with righteousness on his side, he stares at Inigo with narrow-fixed gaze, and replies,

"Just like you would."

And pops a piece of candy into his mouth for effect.

(Dang, he's so cool.)