You could easily go through a vein completely and the gear wouldn't hit it till you pulled out the needle. And when I get blood test from veins or intraveinal shots usually only a drop or 2 comes out but I could be wrong.

Pm CC I'm pretty sure he is the one that told me what would happen if I accidentally hit an vein cause when I first started I was hell of worried about that.

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Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment. --buddah