When I was 4 or 5 my Grandma told me while we were riding in the car, that If I didn't duck my head when we went under a bridge I would get a nasty bump
You know I ducked my head for years after she told me that, I think into my teens.
A childhood belief about cars

others believed things like this
- 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
- my sister when she was little thorght head lice tried to borrow into her head to get to her brainAnon
- i used to belive that if i fell on my head my head would come off while i was doing a cartwheelAnon
- My mom always told me she had eyes in the back of her head. — Ellana
- My father told me if I farted, my head would cave in!— Jae
- My dad always told me to never hold my sneeze and if I did, then my head will explode.— anon.