if you shoot an AI and the bullet fails to kill him, he will instantly fire back (if he knows where you are) and there are no consequences to follow The AI will just turn around and fire back like nothing ever happened.
This can be really annoying in close quarter combat (e.g. you find an enemy around a corner and fire a shot that hits his leg. He will fire back instantly.)
If someone happened to be shot in real life i would imagine that shooting the enemy wouldn't be their top priority as the wound would not only be painful and distracting but also life threatening.