I think, as has been said, it does vary from person to person. Towards the end I could act perfectly normal and not appear intoxicated even to those who knew me very well right up to the point of blacking out. I'm not proud of that but that's the way I was. And blackout level for me was generally in the mid .2's, depending on what I'd eaten, etc. I blew a .42 once and I clearly remember doing it. I was obviously intoxicated at that point but I did not appear to be anywhere near that level of drunkenness. I like me today much better.