When I was little, we used to take car trips a lot, and from time to time we got a flat tire. From watching my dad change flats, I believed that the hubcap was what held the tires on the car, and if you didn't put it back on, your tires would all fall off. I figured that's why there were all those places along the road with hubcaps for sale - in case you lost one.
A childhood belief about cars

others believed things like this
- I used to belive that, when a store held a "liquidation sale", all the unsold stuff would be melted down.— Marty
- When I saw signs stating "Lots for sale" I thought it meant that there was a lot for sale.— Robin
- On family road trips, my parents always told me that water towers were filled with chocolate.— Edith
- I used to think that if a lawyer lost his case, he had to go to jail with his client.Anon
- I used to believe that if you held a Guinea pig upside down, it's eyes would fall out.— james
- I used to dream that if I held my breath, I could swim through the air for brief amounts of time— Adam