Well most recently, I was playing ArmA 2 multiplayer, and I was in this one game, and I was just, to put it bluntly, beasting it out. I went through three objectives, had 30-something kills (including a BMP) and was #1 in the game, leading the way in each attack, all without dying even once. I have never done so amazingly well before or since.
So after the third objective, I'm in the helicopter en route to the next one, when it suddenly drops out of the sky. Not even did the pilot accidentally hit a tall tree, the helicopter just fell out of the sky. And through my rage at having died in such a horrible manner, I see that the game claims that I had killed everyone in the helicopter (a punishment usually reserved for the pilot)!
My theory on what happened is that the pilot either jumped out or disconnected (explaining the crash), and since I was crew chief it made me second in command, and blamed the deaths on me. That or it was just a horrible glitch.
Obviously I was quite pissed off after having had my streak ended in such an unnecessary way and losing a lot of points for team kills I didn't commit, and I left.