I used to think the song "Englishmen In New York " which goes,
"I'm an alien,
I'm a legal alien;
I'm an Englishman in New York." was "I'm an idiot, im a leagal idiot, jumping in your yard"
A childhood belief about misheard lyrics

others believed things like this
- Oh oh, I'm an alien, I'm a little alien...
Legal maybe?— Marina - I thought the ball-headed person in the Bic logo was an alien and communicated using alien-like noises.Anon
- I used to believe anyone who disagreed with me was an idiot.— Catte
- I used to think that New York was pronounced "Yew Nork"Anon
- i used to believe the quarterback was second in command (what an idiot i was)Anon
- That there was an underground tunnel linking New York to San Francisco.— Christophe Chang