A question on aspirating. After inserting the needle and before injecting you should aspirate. Just want to be clear on this! Thats when you pull back on the plunger a tab to check and see if there is any blood coming into the the syringe which would mean your in a vein, CORRECT? How far do you pull back and I'm assuming very slowly? I'm assuming you can't get air into it that way since its in your muscle. And if you do get blood you just pull out and try again. But is the dosage still sage to inject since there might be blood in the syringe? IS THIS CORRECT OR JUST COMPLETELY WRONG!!! Read this off a web site. Want to be sure on every step before going through with it. THANKS ALL