There's an immediate flinch at the sound of the knife hitting the metal so close to his head, a sharp inhale and a grimace lightly contorting his face as he stares at it, then back at the man approaching him. His hands come up on reflex palm-out, trying to de-escalate the situation before it comes down to the possibility of a fight.

"Hey, whoa, hold on-"

But then he processes that there doesn't actually seem to be a fight, even if the woman startled him badly enough to take the initiative. "Uh...hi."