Really it is more risky to do an IM (inter muscular) injection because you have a greater chance of hitting an artery or nerve.. I hope everyone aspirates before they inject their gear.... Chances are low that you could accidentally land the needle tip right in the middle of an artery, but if you do you could inject right into your blood stream... Bad deal... also if there is any air in the needle at the time.. very bad... Oh and to add.. the life of a RBC is 120 days.. and nerves are usually deeper than arteries that are usually deeper than veins....