Last summer Cloud and I threw a big house/apt party. There was a fair bit of alcohol, we made specialty drinks, I baked, we had a chocolate fondue going, I made devilled eggs, etc. In other words, while it was a big raucous party, it was not a college frat party with a keg.
My very good friend was dating this guy Matt, that a bunch of our circle had gone to high school with. He'd only become a part of our circle again in the past year or so, and a lot because he was dating my friend.
The first time I met Matt was 9 years ago, when I was in college. It was 3 am, we were at a corner pizza shop eating 'after partying pizza' on the UWS, sitting by the plate glass windows on the side of the shop, and someone said "hey look, it's Matt". I turned to look through the window across the street, and see a body hurtling through space. He is running, from across the street. He LEAPS at the window, and turns his body so his side hits the window. A cascading of shattered glass and a second later, he is in a heap on the sidewalk. We are in shock. Fortunately for us, the window was double paned, and only the outer one broke. We swore in 3 languages to the shop owner that we were not 'with him', and left as the cops arrived. We didn't see him again for a few more years.
When he showed up on the scene again, I thought he'd matured a bit. Thing is, he has a massive massive drinking problem. He's a totally nice guy when sober.
So anyway, he comes to this party. He's acting like a bit of a jerk, but no biggie, UNTIL, late in the party, there's only maybe 15-20 people left, he stands at one corner of the dining area and waves people out of the way of the dining area. I think he's going to show off ballroom dancing skills, or something equally bizarre, by the way he's standing. Once he has everyone out of his way, he RUNS (at top speed, in a NYC apartment) across the 5-7 feet of the dining area, uses our bench as a springboard, and LEAPS over our glass coffee table (laden completely with glass, ceramic, a burning fondue pot, etc) and into the couch on the other side (which yes, is completely full of people). His foot slams into the side of the coffee table - the only thing that prevented breakage was that the impact ran through the wrought iron frame. If his foot had hit two inches toward the center of the table, we all would have spent the next several hours in ER.
There was DEAD SILENCE. He had this silly grin on his face that slowly faded. I truly think he expected to have fratboylike applause for his stunt. I had to walk into the kitchen, in silence, because I was shaking with anger. No one said a word. I returned and gave him the fiercest verbal smackdown I had ever delivered. I wish I had kicked him out right there, but I didn't, because I knew my friend would leave too.
After the party, we found out that he had also drunkenly thrown an empty jack daniels bottle off our roof, as well as at least 1 empty beer bottle (a lot of people were hanging out on the fire escape and the roof, and were APPALLED at his behavior, and reported to us the next day).
We sat him down a few days later and told him that he was not allowed back in our home, and would not be invited to the wedding, because we couldn't trust him around our parents/grandparents/coworkers/etc. We also told him that it had become painfully obvious he had a drinking problem, and he needed to get help. He felt just terrible about the things he done while dead drunk, and didn't remember all of them. But this happened all the time - he still made the choice to drink, and to drink to excess, over and over and over.
We never had to really test it though (although I promise, I would have stood by all of that), because a month or so later, my friend found out he was cheating on her with multiple women and lying to her about his finances, and she kicked him out. Haven't talked to him since.