I usually don't lose it, but there was this one time when the booze was free...
Well, basically, I could drink as much as I wanted and someone else was paying for it. So I passed out in the toilet in a restaurant that had two different "sides", one playing rock and the other playing techno. Well, I'm sure I don't need to tell you which side I was on.
Anyways, I dosed off in the loo and while I was sleeping they closed the rock departement and moved everyone over to the techno side. I woke up and found the bar empty. Drunk as I was, I didn't understand there was another room in the building. So I tried to piss of the security guys, claimed that I lost my wallet until the third time I told them and they told me to look into my breast pocket, where, sure enough, it was.
However, I decided to go home, but didn't have any money. Normally this isn't a problem, I could always walk (it was only 3 kms) but that night it was raining sleet, something between snow and water and I was pissed beyond imagination. So no walking.
I wanted to take a taxi, but I needed money. The only problem was that the hole in the wall wouldn't let me. I got my PIN code right, but there was somesort of update going on and they couldn't connect to my particular bank. So no money, not even enough for a bus fare.
I sat on the town square for about an hour to clear my head and stumbled that 3 kilometers back home in the sleet-storm of the year. That was fun.
There have been other occations that I've done something morally questionable, but then it wasn't the liquer talking, it was just me.

And BTW, the thing I just told you about happened years ago...
Ice