Oxygen Bubble in the vein. Not to give offense to any smart, dedicated and experienced brothers out there, but seriously, have you taken a look at some of the fuckin morons that shoot themselves, it's not rocket science. If your not comfortable, it's understandable, but are you helping the situation ? The're plenty of medical quality guides on the net that teach you to shoot. If you could read the directions on how to register for this site, you can read directions on how to shoot yourself. Pick up your skirt, grab your ballz, and do it. All in my humble opinion of course.