Don't worry about that you will find some people are that way inclined you may well have over negged a miserable average girl who would be used to being put down. You see with a hot girl she is used to being complimented thats why putting her down or negging is differnt and therefore makes you differnt if the girl is a 5 or something, chances are she does not get those complimants and often gets negs, so it wont be new or refreshing and she is more likely to take offence. Yu need to also practice cocky funny as i don't think you can pass it off otherwise.
Super bitches like that need disarming and some form of entertainment, Cocky Funny may well have gone donw better, "why are you talking to us?", "I fantasised about speaking with you in a dream last night, it's a shame i woke up when i think we where about to kiss"..."R u for real?"..."look it ws just a dream- you do realise dreams are not real anyway lets play a game... i bet you a drink i can win;)" now look this link and use this routine from styles 5 questions,
http://www.youtube.com/watch?v=0aWoN8MvGKw