The Ravenclaws had a fifty point lead and their bloody seeker refused to get off his tail. Seriously, she was pretty much riding on the back of Harry's broom at this point. A pretty third year girl who looked like she was going to burn through Harry's head the way she was staring at him. And the snitch was amused by this, bloody idiot, staying just this side of close to her. If Harry made it obvious, she'd get to it quicker than she would. So he'd have to play smart. 