Part of him wanted to pull out his wand and hex this man until he screamed, but Blaine restrained his temper... for now. "Very well," he replied finally, holding up his hands as he took a step back. "But you'd better back off, Nott. Or I'll be back. Or better yet..." One more flick of his gaze up the stairs, and his voice grew a little louder. "I'll just show up at a certain dance studio, or at one of those little shady Muggle bars, and I'll find Tracey and convince her to make you back off. Alright?" He flashed the man a tight smirk and then, without waiting for his response, disapparated.