Sorry I forgot to mention, he works in a distant city and in that situation he came home for a day.. he doesn't have his own house since he lives in a lodging room at work. Surely it was a pattern that has been ignored, even tho he didn't (for example) shout like that before but held everything within..
It's a thing we have in common, we both used to repress anger even if I managed that better.. I don't know why, I probably considered it a 'civil way' to react to others (in adolescence? sounds like I need one), and maybe he did that too..