I used to believe that a cars rear exhaust pipe provided the power to propel the car forward. I always remember avoiding walking anywhere near the rear of a car for fear of being 'blown' off my feet.
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 used to think that cars were powered by a jet of air which came out of the exhaust.— BadDeal
- I thought that people were like cars because cars have exhaust pipes, and people fart.— Matt
- 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
- Some sport cars have a double exhaust. I wondered why. Why would people want to pollute twice as much?— F*ck the environment?