My girlfriend seems to think that it is possible to register without being in a vein. Her theory or idea on the matter is that if she has a bruise and the blood vessels are burst there is blood pooled up under the skin that can cause you to register and pull blood without being in an actual vein. It doesn't seem possible to me but she thinks it is an will cause her to be registering but won't feel her shot properly. Our veins are in a bit rough of a state because we're both opiate addicts and have been speedballing (cocaine/crack) quite a bit over the last 5-6 months. I feel that opiates are quite gentle when compared to cocaine and then crack being the worst.