Did you play Tomb Raider Legends?
The ending on that was awesome. Copy/paste to make the font size readable.
Lara finds out one of her old friends, Amanda, had something to do with her mother's disappearance, and she threatens to kill Amanda, pointing a gun at her head. Lara is so pissed that she shoots her gun off a few times, purposely missing Amanda, but close enough to scare her. Finally she turns her back to Amanda, having apparently decided not to kill her. But then she turns around and pistol whips Amanda, knocking her out. Then Lara leaves, leaving Amanda still knocked out (I smell a sequel!).
I thought it was pretty powerful.