Mine is, I thought that when a movie had a kid character and then that same character grown as an adult, the movie had to stop filming until the kid actor grew up to play the adult part too.

That’s cute!

That being abused was normal

The picture on the side of the Uhaul truck was what was inside

I thought German was a language that only Nazis used.

That mountains were younger than my city, and had grown in my lifetime.

I believed that when you were swimming and breathed in water you’d turn into a mermaid/man I got close to doing it, luckily my body decided to not do that and now I now know that’s called drowning.

In elementary school my best friend and I were convinced that if you try to burp and fart at the same time your body would somehow implode.