I used to think that a "carnival barker" was a person who barks like a dog at a carnival.
A childhood belief about excursions

others believed things like this
- I used to believe Elizabethan collars are for dogs to amplify their barks; just like how a loud-hailer works.— jaschenyy
- i used to believe that when a person moved away, they switched houses with the person that bought their house— alli
- I used to think that if a white person and a black person has a baby it would be mexican.— J
- I used to believe that anonymous was a person, and I thought, "Gee, this person writes a LOT of poems!"— Katie Albano
- I used to believe that I would be the first person to see air.— Andrea W.
- I used to think that I was the only person to have a penis!Anon