I believed that vehicles were propelled by the exhaust pipe that was coming straight out the back. However, I could not figure out how the vehicle was propelled by the ones that came out to the side of the car. Around ages 4 to 6.
A childhood belief about cars

others believed things like this
- I used to believe that cars were propelled by their exhaust like some kind of rocket.Anon
- I used to believe that car exhaust pipes were what propelled cars, instead of the engines.— Thomas Johnston
- I used to think that motorcycles were propelled by farts.— Meredith
- i used to believe that every time i farted i was being jet propelled.— chuckipoo
- I used to believe that the exhaust fumes coming from a car were actually what pushed it forward like a rocket — rocket car
- I thought that ice cream trucks were the only vehicles that couldn't kill you if you got hit.
Anon