Annapurna sounds like quite the trip. Thats a unique story. I've also climbed after a few rough nights or wearing inappropriate attire.
I have much crazier experiences on the mountains in Southern Seoul like Gwanak and Cheongyesan.
Although, I did see quite a few people enjoying makgeolli up there, as usual.
I'm so used to old people surpassing me on the mountains, I've stopped caring.