Mine is less with a game and more with a person playing said game.
The game was Battlefield 2142. I was in the middle of the biggest sniper rifle ASS WOOP sessions EVER. In that life I seriously had a 1 to 1 shot to kill ratio (and I fired 32 rounds).
It was fucking awsome, until HE showed up (he shall be known as Leroy). Leroy had obviously looked at the score board and saw that I was kicking way more ass then everyone else, so he decided to go find me and get some of the action.
So he finds me (I'm prone in my epic hideing spot) and he decides to stay with me in order to "help" me. Here's the problem, Leroy is standing up where every one can see him. And within 2 seconds of his arriving, an enemy puts a greade right on top of me (I die, epic kill streak broken).
And after that, the shit hits the fan. Leroy decides that that the enemy who killed us just got lucky and keeps following me EVERYWHERE.
I started that match 32/0. When the round was over, I was 31/20 (I got a negative because I shot Leroy in the face hopeing he'd get the message and leave me alone). "COME THE FUCK ON"
And then, when the match was over, Leroy had the gaul to yell at ME saying things like "you are the WORST fucking sniper ever.""Because of you I didn't get anything that round." and "The only way you could have got those 32 kills was if you were cheating you fucking *****." all because he hadn't gotten a single point.
I LOST IT!
I spent the next 3 minutes cursing his ***** ass out, using every curse, vulgarity, racial, religious, and ethnic slur you can think of, and stringing them together into a tirad that would have made the worst potty mouthed sailor in SATAN'S navy blush! (By the way, Team Speak was on so the entire room heard me, and they were all laughing their asses off)
And then the little pussy went to the Admin, who had heard EVERYTHING, and tryed to get me kicked.
The Admin then turned around and told him to (and I shit you not) "SHUT THE FUCK UP *****".
The Admin then called a vote and the room voted unanimisly to BAN Leroy permenently.
So, I guess everything worked out in the end.