Im going to side with ZZtiger. I have a feeling alot of these replies are from people that dont drink very often.
If you drink enough, you'll know your limit. And thats actually irrelevant because he was still below the legal limit so who cares? And the legal limit is set VERY low. He was just surprised that he was that close when he thought he was way under because he felt completely fine and stopped drinking awhile ago.
People calling him a retard, and comparing him to drunk drivers that killed families are retarded.