that happens to me when i don't use or drink..i can taste the smack, i can taste the vodka... good to hear though u managed to beat the urge. flashbacks happen i think when something triggers ur brain...if something happened where usually u would drink/use, then ur brain sends signals this is how we deal with it....but u (wiv help) retrain ur brain...its what i was told is learned behaviour when a trigger like this happens