[Sethomas]

I know jack shit about fighting, but logistically I second the blow to the abdomen bit. The main reason is that you could punch him really hard in the head and he'd be fine after a few days, but it's dangerous because if he loses his balance he could hit his head on a hard surface and you'd be liable for severe head trauma which may include death. It's highly unlikely this would happen, but it's happened before and is not far-fetched. Besides, a facial blow would leave visible bruising which wouldn't bode well amongst the civil folk if he were to register a complaint.