i'l be honest with you, i couldn't do it. And i haven't been able to do it since. I feel like a little bitch and a pussy, but it's something most people won't do in their lifetime. I had the needle about 1cm from the skin, and i just froze up and couldn't do it. I'm not worried about hitting a nerve, or blood vessel or anything like that. It's just not knowing what it would feel like when the needle goes into the muscle. I just couldn't do it.