Sadly this goes on more often than you think. In my younger days, I engaged in this kind of stupidity with my equally stupid buddies. One night in particular when I was in the Marines, we were at an off-base bar and got into a shot-drinking contest. I woke up in the middle of the night in an alley outside the bar passed out and had absolutely no idea how I got there. I was covered in my own vomit. Last thing I remember was that a couple of my fellow Marines stripped naked and hung upside down from the rafters. They ended up getting arrested and they lost a stripe over it in NJP (non-judicial punishment). Somehow I managed to get back on base and cleaned up for morning formation but to this day, I have no idea how I ended up outside the bar while others were inside getting arrested. It was my one and only alcohol induced "blackout."
Never understood why it is considered "manly" to handle copious amounts of hard liquor but peer pressure when you are 19 or so is hard to resist.