See I agree with the green and yellow lines, they sound spot on, but I have to say you should have an orange line too, that of "I'm having an f-ing awesome time now, and I'm really going to push my luck and oh no, onto red line territory" kinda deal, cause half the stuff in the red line sounds pretty average to a good party mate. To be precise: Orange line is the having a great time, very drunk and very loud, but still holding it together. It's the danger zone, cause a drink too many and you're into the red zone where you're definitely having a sit down and a glass of water and maybe reconsidering the whole alcohol thing for a night.
Or you power through to the black line. Puking, passing out, pathetic prick. Bonus points if you go to the hospital.
To clarify the black line stuff; it may be a reflection of the terrible attitudes towards self destruction in Aus, but really, my mates see puking as an excuse to pack more in, if you're still on your feet you're alright to go. For an example of a real blacker-than-black situation when it comes to drinking: Finding out the girl you have a crush on is O.Ding on heroin via text*; then skulling a bottle of vodka in 15 minutes flat and waking up in the emergency ward with EKG stickers on your chest cause they couldn't find your pulse. That there, is the black line. (Felt fine on waking up though; didn't puke, just managed to metabolise a litre of vodka. I, as a general rule, don't get hang overs. Be jealous.)
*It was like that scene in pulp fiction, except she's in a different state and you have to wait for 5 minute intervals to find out if she's still alive. Fuuuuun times.