ok, so i am planning to make my first injection this upcoming week. i plan to inject 250mg of sust in my glut. a close friend is going to administer the injection and i want to make sure i have it down so that he dosnt kill me because i know that if you get any air into your bloodstream you die. i am aware of what aspiration is and that it is a necessary component of injections. however, i am confused as to what to do after you check to see if there is blood in the syringe. here is my question. after you pull back on the plungr of the syringe and indeed you are in the muscle by not withdrawing any blood and see air bubbles, do you proceed to inject yourself despite the bubbles? is this safe or is this incorrect? thanx