Same here. Toward the end of my drinking career, I was trying to taper down to zero. One night, I'd had less than half of what I would normally consume in an evening. I blacked out and woke up in the morning still drunk. It was very confusing because it was way less than my "usual," and yet it knocked me flat. That was very scary because it had never happened before. But I took it as a bad sign, and quit cold turkey the next day.
I would agree with the reverse tolerance thing. Never a good sign.