I'd be very very tempted to just ignore it. Treat it like an unjustified outburst that is obviously more about him (tired? stressed?) than you. He'll probably have forgotten in the morning anyway and if he brings it up, don't defend yourself as it doesn't seem to be your fault at all. Validate, perhaps.

M39 D6 D3 (at S)
S 2014-09
D 2016-09

"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.