The thing about having a mechanic where the player can shoot themselves -- I can see it being fun mechanically in the abstract, but I think when you connect it back to its meaning in the world, that my character just randomly shot himself during a battle, it's potentially just going to come off as stupid and obnoxious? I mean it sounds like the sort of frustrating thing where people will tend to blame the game for it happening, because it will risk feeling more like a bug than a feature. It might work a bit better if you could find a funny way to acknowledge the weirdness of the mechanic, in the dialog perhaps ...
(of course, maybe I'm just wrong and it's fine! feel free to ignore me, I am just musing)
Mm.. It definitely runs that risk. It is definitely not a random thing per se, e.g., it has it's own (slightly muffled) sound effect and is also something you can only do with the handgun. However I do think letting the player know that they shot themselves via some text is not a bad idea. In testing, players didn't have a hard time understanding what had happened, however early cuts had it that if you clicked your gun you would shoot yourself; now, it doesn't count if you shoot your gun. For various reasons (basically, that your guns sticks out and tracks the mouse as you spin around) it was obnoxiously easy to shoot your gun. Now it's fairly hard, but some enemies does latch onto you and it can be really satisfying to carefully pick them off without shooting yourself!
Anyhow =) We shall see! I try to make things as clear/balanced/interesting as I can and see how they shake out in user testing...
EDIT: I should add that I'm very much not averse to throwing things out when they aren't working, so if it really is an issue I will ditch it!