Like most kids, adults told me when I was little that if I make a face it would get stuck like that. My neighboor's mom had a lip deformity and I always thought it just got stuck like that. Years later I found out she had medical problem.
A childhood belief about appearance

others believed things like this
- If you pull a funny face, the wind will blow and it will get stuck.Anon
- i once thought that if you jumped high enough in the air, you'd get stuck!Anon
- I thought that kids' pee was yellow and adults' pee was clear.— Aretia
- If you cross your eyes, they will get stuck like that.Anon
- Up until about six, I use to believe that everyone had a different color of pee and I was stuck with yellow.Anon
- I thought cartoons were for kids and "real-life programs" for adults.— Ichigo