I used to believe that by just shutting the door to the airplane bathroom would cause the "occupied" sign to come on. I didn't realize you had to lock the door first.
A childhood belief about aeroplanes

others believed things like this
- My sibs and I thought that the screen door was called the "scream door" so Mom could yell at us through it. — Kyle
- I used to believe there was a secret door to the gremlin world hidden under my bed— Mel
- i thought there was a door in the back of the tv and if you wanted to be on tv you just walk in— fred
- My friend desided in kindergarden that she would be a door when she grew up.— Oops!
- I used to think that you could get a tan if you turned the oven on, opened the door and stood in front of it.Anon
- i used 2 believe when i left my closet door open at
night a skelleton would pop out and wave at me— bex