My brother just assaulted me. Idk what to do right now.

Besides hitting me, he bit my arm pretty bad. Fortunately I was wearing long sleeves otherwise his teeth would've punctured my skin worse than it already has. We're in a small town 30 mins away from home because I had to cart him around to interviews, and whatever else at his beck and call. Had an argument that he kept egging on getting incredibly personal about, and I threatened to drop him off unless he shuts his mouth, especially since I'm out here doing him a favor. Then he snapped. Some lady almost called 911 but asked me first. I told her no, of course because my parents wouldn't take kindly to me getting him arrested. Idk what to do he's acting like nothing happened and he wants to carry on to go hang out with his friend around here. I just want to go home, pack my shit and leave for good.