When I was young I saw a Tarzan movie with a huge ten foot tarantula attacking him in a cave. Later, in my teen years, I was shown a real tarantula and said that must be a baby - the adults are 10 feet tall. I had believed that was their real size!
A childhood belief about creepy crawlies

others believed things like this
- I saw a spider on the floor and thought it was a baby tarantula. We don't even get tarantulas where I live.Anon
- I believed I could tap dance by moving my feet real fast. — Aussie
- I was convinced that Gorilla soldiers in Vietnam in the 70's were real Gorillas attacking other Soldiers.— Mario
- I used to believe that when you are 90 years old, you are also 90 feet tall.Anon
- I thought cartoons were for kids and "real-life programs" for adults.— Ichigo
- My mum used to tell me she used to be a cave man and i believed it for years. Anon