My dad can be pretty scary. He saved the wizarding world as a teenager and faced Voldemort like eight times, so people are a bit scared of him before they even meet him. My first boyfriend was in the summer of my third year. He came over and we chatted with my parents for a bit, and then Dad took him out to the yard to "talk" while I finished getting dressed. By the time we left, he was all pale and shaky and weak-looking. Neither of them would ever tell me exactly what happened. So my dad's pretty scary.