I never learned to swim. At age 14 I felt like someone pushed me into the river at noon time, sun was very bright and there was no one there but me catching fis

I never learned to swim. At age 14 I felt like someone pushed me into the river at noon time, sun was very bright and there was no one there but me catching fishes alone, I fell right into the river. I didn't drown I figured out how to swim out of instinct - I wonder how common it is. This is one of the least things shown in movies that some people can end up swimming on their own without having previously learnt it.