That's one theory for it, anyway. [Really, Itachi was spooky - he still is spooky - but he's not immediately something awe inspiring to him (like Katara or Law) right now, but he's also not something mundane. He's something that clearly makes a reaction in other people he knows are impressive, and related to someone he genuinely does fear.
Not that this plays out on his face with the easy smile on it which doesn't entirely meet his eyes] It could just be your gravitas.
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Not that this plays out on his face with the easy smile on it which doesn't entirely meet his eyes] It could just be your gravitas.