Nikola took a half step backward, lifting his hands to catch hold of the person who bumped into him. He didn't want anyone--student or teacher--to fall to the ground.
"Miss Foster," Nikola spoke gently, though there was an air of haughtiness ever present in his voice. It was not unkind, though. "It might behoove you to keep a better eye on where you're going. I can't guarantee the next person you bump into will be as soft as I am."