I’d say the closest I’ve been is when I made the decision of trying to swim in a river. (for context, I’m a fairly weak swimmer, only really do it in pools) One moment I was kinda treading water and the next thing I know, a current is pulling me under and I’m swallowing way more river water than I would like to. I would have probably kicked the bucket that day if the group of teenage boys near me and my friend hadn’t noticed me going under.