Almost drowned.
I was just a small kid at swimming lessons (so not deep water). It was the end of the lesson for the day and I was heading back to the locker room. I was the last one I guess. I was using one of those oversized beach towels... and I slipped and fell into the water with the damn towel wrapped around me. I wasnt a good swimmer, panicking, unable to tell which way was up. Not a single person noticed I feel in our heard me. If one of the instructors hadn't walked out of the locker room when he did and noticed me I would have died. My dad was maybe 20 feet from me chatting up some other parent. But because it's an old pool in a school, it has this wall that basically prevented anyone in the bleachers from seeing most of the pool (except for the diving board on the far side), so I was drowning in the blind side.
To this day (over 2 decades), my mom and step dad love to bully me about how I had a fear of getting water in my face when I was young afterwards. One of many stories they love to tell!
I can swim, but I still prefer not to.