Below are the effects of increasing BAL. (Blood Alcohol Level )
0.02 - 0.03% Few obvious effects; possible mild light headedness, mild relaxation; automobile accidents are twice as likely to occur.
0.05 - 0.06% Slight sedation; feelings of warmth, relaxation. Driving is risky, accidents are four times as likely to occur, defects in fine motor skills and decreased reaction times begin to appear at this level.
0.08 - 0.09% Feelings of euphoria may occur. Motor skills are clearly impaired, mild speech impairment may become noticeable; balance may be affected; recognition of cognitive and motor deficits is lost, and the drinker believes s/he is functioning better than s/he actually is, depression if present may become more pronounced. feeling "buzzed."
0.10 - 0.12% Euphoria; motor skills are markedly impaired; lack of coordination and balance memory and judgement are markedly impaired; recognition of impairment is lost; people often forget how many drinks that have had; inhibitions are gone; in males, impotence may occur; emotions are exaggerated; increasing belligerence in some; "play" becomes increasingly louder. Legal level of intoxication for DUI in Pennsylvania.
0.14 - 0.17% Major impairment of all mental and physical functions; euphoric (pleasant) feelings are beginning to give way to dysphoric (unpleasant) feelings; difficulties in walking, talking and standing; severe deficits in judgment and perception (hammered).
http://www.studhlth.pitt.edu/studenthealthed_wbpage/Alcohol/links/page5bal.html