I'll try to talk things down if it looks like he's just on some rah rah shit.
I have a feeling that if he actually does want to get physical, he's not going to be direct about it. It'll likely be one of those look away for two seconds and steal on me type attacks.
But he did all this after going off on my wife (his sister) for not shirking a list of responsibilities for the month.
And it was all done via text. He's very manipulative and lashes out whenever he doesn't get his way, so I can't tell how serious he was or wasn't. He called me right after this. I called back twice with no answer and he hasn't contacted either of us since.