I'm not sure if this counts as something that I've broken, but my friend and I beat the shit out of each other over Goldeneye.
I can't recall the details exactly, but I do remember parts. We were screwing around in deathmatch, with me in the lead. I was only a few kills away, and he was really starting to get pissed off. So I'm about one room away from him, and right before I get my crosshairs on his head he yells out "Don't shoot yet!"
BS. I shot him anyways. He got up and turned off the N64. I was STEAMING pissed. You simply do not shut off a good game just because you're a sore loser pussy. So I punched him in the gut. He got up and punched me in the face. Somehow we ended up on the floor, pounding the ever-loving hell out of each other.
I can't remember exactly, but we decided it would be best if we went outside to kick the crap out of each other, so as not to break any furniture. It was Winter, and there was snow everywhere. So yeah, we pounded on each other for about 20 minutes, both of us having freezing cold faces from being shoved into the snow. I recall hitting him over the top of the head with ice.
Eventually we were so tired we just kind laid there with no energy left.
All of this was over a fucking game.