Faint and dizzy is something he can relate to; he feels a little drunk, like he's not quite in his body, like he's floating somewhere else. He doesn't know whether it's the blood or whether it's the shock of what he just did. He wrenches his gaze away from the handkerchief with no small amount of effort. He doesn't want to see the blood, he doesn't want to think about the blood, he doesn't want to focus on the fact that he could bite Ned again, and he could bite him longer this time, and he could probably kill him, if he really wanted to.

"I won't do it again."

The blood he was able to get before Ned shoved him away will tide him over for now. Unfortunately, it's also given him a taste for blood, something he'd only been able to speculate about before. "I can control it." That's partially true; he's not ravenous enough to be out of control, and he feels pleasantly drunk, almost too lethargic to put any effort into attacking the other man again.

"Is there anything I can do? Or should I just go?"