Adults and children can often remember things from when they were around three or four years old. Some memories are good, some are fuzzy, but some are so strong, even if they weren’t good, that we can’t forget them our whole lives.
I was about six at a party at my dad’s secretary’s house. He thought it’d be funny to throw me (fully clothed and unable to swim at the time) into the pool and laugh at me in front of everyone. I was so humiliated and embarrassed that my own father would use me as a prop to make his moron friends laugh.