I just pinned myself in my left glut, i checked to make sure no blood was in the syringe, none, then I injected. I did however move the needle around a little,(hitting the glut while looking in a mirror is tough). After I took the pin out, a reasonably small flow of blood was running down my leg from the injection site. Blood really doesn't make me squeamish so I could keep in perspective that it really wasn't that much. I just want to make sure the test is securly locked into the muscle, and that none ran out with the blood, because that would really suck!