where you player stabs the needle in your stomach:
he/she injects it into his/her arm.
Make me a model, and I'll whip up a script.
I'm sorry, but you're a majour idiot if you think you inject yourself in the stomach. Why would you do that? The needle can't reach any veins if you inject it in your stomach. If you look closely next time you play L4D2, he/she injects it into his/her arm.
Grabbin' Heroin.