He should totally expect this level of confusion from Inigo, shouldn't he? It doesn't wipe the smile from Tidus's face, cheerful despite the whole small scene. Or because of it? It's goofy, he doesn't care about his pride.

Except-! "Heyhey, this wasn't a spooky scared! This was a 'thought-something-was-jumping-out-and-attacking-us' reaction!" Which also isn't about being scared, okay. "There's a big difference!"

Please learn the difference, Inigo!