Ps. For folks that haven't experienced blackouts, it is not "passing out." You are still moving, talking, interacting, buying plane tickets to Argentina...but the next day you have zero memory of any of it. Not even flashes. Your brain is wiped clean.
Brown-outs are when you have periods in a night that you cannot remember. You remember this part, but then there's a vague gap, then a memory.
I know some very heavy drinkers who have never had one. For whatever reason, for me, they increased in frequency. I am grateful beyond measure that I did nothing that would have changed my life forever.
Even if this is your first one. Stop drinking now! They'll keep coming!