Nothing
too serious. I used to playfight with my friends all the time and for some reason me and another guy used to punch each other on teh arm to see who could punch harder (stupid, yeah, but fun). He's stronger because, well he's been in lots of fights and i'm a wuss who hasn't been in a single fight.
There was one time when i came very close to going full blows with one of my friends. This guy is very immature and he does things that make him look like a five year old. When he does them he doen'st think about the concequences, and of course he denies everything afterwards, despite the fact everybody who was there saw him do it.
So anyway, i was kicking around a stone (i have no life) with him and another friend when this guy (we'll call him "fruit") starts getting a little out of hand. He starts running into us, sticking out his elbow, punching us. At first i just tell him to settle down, but it was getting out of hand. So i gave him a little push and told him to stop it. He pushes me back, i push him back etc. Then he puts his hand into a fist and pushes it into my neck. Not expecting it, i fall back onto the wall behind me. Fruit just pushes harder and harder. I tell him to let go, but he doesn't do it. I was starting to get a little pissed now (hey, i hardly ever get angry at people. it takes a lot to piss me off). Then he said something that got me extremely cloes to the edge. He threatened to kill me. OF course, he had no idea how serious that was to me and it wasn't serious at all to him, but if he hadn't let go shortly after that, he woulda been begging for his own life, and i mean that
Since that, i always find that i get pissed off at him easily. Hell, he never even apologised to me. If he does anythiing like that again, i won't be so hesitant to kick his ass.