I have a few, but here's the most life changing one.
The first NYE after my wife and I were married (also our first together, introduced in January, engaged in Feburary, married in April(14years almost)) we were attending just a small family get together at my sisters place. Now my wife had always been able to go drink for drink with me, so while I was drinking whiskey which Julie doesnt really like, she and my sister took a quick trip to the bottleshop to split a bottle of vodka between them, she manages to force down a small mixer she wasnt really enjoying before we have to head home (our lift decided to leave early).
About 11pm nothing happening at home with just the two of us board off out nut we head down to a quiet (maybe a dozen people there NYE), local bar 10min walk away. We order a drink each I have no trouble finishing mine but again while Julie is in the mood for drinking (being NYE and all) she just cant seem to. By the time midnight comes round and management shouts everyone a free champagne to bring in the new year she can only force down a few sips of that.
Come a week later and trip to the doctor the explanation, she's 4-5 week pregnant. Her body or the foetus or both was telling her "NO" when she didnt even know why. (not as freaky as her second pregnancy positive but that another story)
This wasnt the most drunk, outlandish or dumbist NYE for me just the most life changing
Andrew