Purity - Non numbing cocaine?

[cocaine-curious]

SWIM has heard people say that the numbing effect is not a measure of cocaine's purity because sometimes it is cut with stuff that produces similar numbing sensation. SWIM is wondering if anyone has insufflated good CHCL with the typical cocaine effects which had very little numbing effects?
SWIM snorted cocaine resulted in non-stop talking and energy but hardly had any noticable numbing effects. SWIM, for his first time did nearly over half a gram on his first time and on the come down that came shortly afterwards was full of heart palpitations, excessive hunger and shakiness. SWIMs friend also snorted from the same stash but did not suffer any terrible come down. SWIM had similar heart palpatations on the comedown when he experimented with crack, which was oddly enough, before SWIMs first experience with powered cocaine.