Crowbar moron

this kid, 18 or so was doing burnouts and drifting around my nanas street when I went to pick her up for dinner, and my mum who was there too decides to go tell his mum. So we go over there and he intercepts us first and mum's like "I don't want to be causing you trouble but you really shouldn't do that" and he explodes at her and makes her cry. Which is not something that I am willing to abide. So I tell him to watch his fucking mouth and to grow a brain before he kills someone, and he gets in my face screaming at me and threatening me, and I tell him to step back and get away from me. So he goes and gets a crowbar, bets riiiiight up in my face (Well more like chest, he was only about 5'10") and goes "How about now? You wanna try something? I'll smash your fucking head in" and so on. So I took a calculated risk and called his bluff and said "You hit me with that and you'll be ruining your life" and when he asks me if I'm saying I think I could kill him, I told him that no, I wouldn't kill him, I'd just put him in the courts for aggravated assault, hoon driving endangering life and for being a cunt, taking every cent from him, having his car crushed and putting debt on his family, PLUS putting him in hospital. He didn't seem to like that and backed off a little, called me fucking stupid and stormed off inside to get some rope to put in his car. So I went with my mum who was speaking with /his/ mum and apparently he'd been having anger issues for ages and had a fight with his girlfriend, put a hole through the wall and was saying he's gonna drive off and hang himself. So we comforted the mum as best we could and I took down his license plate number (Made sure he see me do it) and we went out to dinner as planned. But far out it's left a bad taste in my mouth