Oh...I'd use my knife. The difference is I hopefully wouldn't have done anything that could have been seen as provocation before hand (I definatily wouldn't have thrown the bottle), I would have used a smaller knife, or a knife that I could justify carrying for reasons other then self-defense so there could be no accusations of premeditation, and I would have intended cut the attacker in nonlethal areas, areas that would stop him but not kill him.
If the knifer had done these things, he would not be dealing with a homicide, and the other guy would be dealing with assult charges. Instead, he now has to defend himself for murder. He'll probably get manslaughter, and go on vacation for a few years. I wonder if there is any way for us to follow up on the sentancing, w/o having to do a ton of leg work?