Zuko's mind was elsewhere, so when Asuka bumped into him, he jumped back, dropped the glass so that it shattered and the alcoholic liquid soaked the ground, and bent flames around both of his clenched fists. It took him a moment to recognize the girl, as he'd never seen her in person before, and relaxed some and stopped bending. He stood straight, scowl still in place.
He took the 'look terrible' comment as a reference to his scar and brought a hand up to touch the dark, rough flesh out of habit. "Old news, Asuka."