I used to think that since fuel was consumed by a car going forward, that if you pushed a car backwards, the tank would fill up.
A childhood belief about cars

others believed things like this
- I used to believe that the exhaust fumes coming from a car were actually what pushed it forward like a rocket — rocket car
- i believed that little men sat in the back of vending machines and pushed the sweets forward.— rachael
- I used to think that the TV show "Shark Tank" involved actual sharks in a tank.Anon
- I used to think when an airplane ran out of fuel, it stayed stuck in the sky.— BoB
- The bus needed coins to run; it would melt them down and use them as fuelAnon
- My parents used to own a Restaurant. I belived the lobsters in the tank were pets.— Ned