Dont give him advice like that. If its heroin youre not going to want to do a line like you would coke. youll have to do a much smaller line if its H. try a small one and see if you get all hyped up and could talk for hours about shit that doesnt really matter. If you do then its coke. or put some on the end of a filter of a cigarette. smoke it and if your whole mouth goes numb youll know its coke.