I used to think that ducks lived under bridges as whenever we drove under a bridge my mum and nan would shout "DUCK!"
Later, after I had realised, I thought that you would hurt your head if you didn't duck down.
A childhood belief about cars

others believed things like this
- I used to belive that if I didn't duck when going under bridges they would hit me.Anon
- Whenever I was upstairs on a bus, I didn't believe that it would fit under the bridge so I used to duck. — Dave, Lancashire
- i thought that "aromatic" duck was actually "asthmatic" duck.
poor thing...— rachael - I always thought that duck sauce (from chinese restaurants) was duck poop.
— emily - My mother's name was Anna. She was called "Annemor"(Duck mama). I was convinced I was a duckling.— Christine Norway
- I thought ducks couldn't fly - thats why they swam.— G