O J Simpson Self-Monitors His BAC

O. J. Simpson likes to relax at this bar even though he’s shackled to a strict drinking limit. That is one of the terms of his parole: not to drink “to excess,” defined as a .08-or-higher blood-alcohol content level. Simpson monitors his blood with a personal Breathalyzer day and night, since a parole officer could burst into either bar or bedroom to test him at any moment. 

Gee, I guess he got "drunk" on a very low BAC.