Can I ask what your attitude was like outside of your LBS?
My MLCer seems to have what I can only describe as a pent up rage, particularly aimed at men. (I won't get into his daddy abandonment issues, it is far to obvious why it is men of a particular age and persuasion.)
It is almost as if he is itching for a fight (this from a man who spent most of his life conflict avoidant).
The guy who drives to close to him, the person who get's his coffee wrong, the guy who chastises him for something stupid at work...All are targets and 'trigger' this rage in him.
As you talked about..he also had a filter before that would make him think things, or be annoyed, but he wouldn't have started anything because you know... consequences.
He routinely talks about his 'filter' being broken. About not caring about what happens in the moment.
Did you have anything similar to this while in your MLC? Did you ever find yourself monstering at people other than your LBS?
You know this is MLC when you have played emotional hot potato with a pair of crotch-less tights.