OK guys, it can be from any game you ever-played with another person or people, on or off-line, and it doesn't have to be a video game if you don't want, you can do board games or sports or whatever, just try to limit it to 3 in each post if the stories are long. Here are 2 of mine to start things off:
I was playing NBA Jam on N64 with my friend back in like 2000 (yes, we were still playing N64 then



Back when I was in middle school, I used to hang at this place called GC Crew almost every friday night in 7th and 8th grade, and it was there that I discovered one of the most unrecognized hiden treasures of video games...the Power Stone series. It was a completely 3D fighting game on Dreamcast and a big hit (though sadly very unknown outside of GC Crew by most I knew) and I was addicted, every friday, I couldn't wait to get my hands on it and school every chump that stepped up, but when PowerStone 2 arrived at GC Crew it had multi-player modes, and the place went crazy. Some people who didn't even hangout in the game room would come just to watch the crazy 2-on-2 team matches!
But let me get back to my point, one of the things you could do was collect 3 of the seven power stones to transform your warrior in to some crazy suped up fighter and start throwing power moves. I was the character named WangTang and my partner (a stranger who had been in line behind me when a team in front of us lost) was the English pilot/boxer named Falcon (Fokker in the Japanese version). It had been a pretty desperate battle in the desert stage that night but we managed to take out one of our opponents and get 3 of the stones each. One of WangTang's power moves is this huge energy ball the size of two storie house that he throws at his opponents while one of Falcon's is a horde of about 30 homing missles he unleashes on his opponents. The survivng member of the other team was pretty good at dodging our attacks, but I manged to cath him in the back with the huge energy ball when he jumped. While he was being carried into the air, my partner unleashed his missle horde and the resulting K.O. was so amazingly devastating I almost fainted...seriously!

Alright, those are some of mine, I can't wait to here other some form the rest of you, and remember it doesn't have to be a video game if u don't want, it can be a board game, sport( including extrene and martial arts or anything you consider a sport), etc.