Well, the violence certainly is surreal and over the top.... but you must have been watching a different cut of Kill Bill I than I, if the only "red" blood you see is after the scalping.
They must have had fire hoses attached to half the stunt people in the big fight previous to that... fire hoses attached to high-pressure fake blood that was squirting halfway across the restaurant.
LOL... actually, I did completely forget about that bit... but I suppose that there again the blood is so overdone it hardly seems to be "real" blood... with that in mind, the only "real" blood we see is at the end. Am I right?