When I was little every time my day would fart he would say it was a mouse on a motorcycle. I never saw any reason not to belive him. I always pictured something from a Tom and Jerry episode. Eventually I figured it out.
A childhood belief about farting

others believed things like this
- I used to belive that, if you swallowed your chewing gum, you'd fart bubbles...— Heidi, Pittsburgh, PA
- When I was little I used to believe that comedian Jerry Lewis and rocker Jerry Lee Lewis were the same person.— Paul
- I used to think that when I moved the mouse around on the mouse pad, I was giving the computer a massage.Anon
- A motorcycle was started by jumping up and down and bouncing on the seat.Anon
- I used to believe that the solid double yellow lines on highways were the motorcycle lane.— jeech
- My brother once told me that if you burp and fart at the same time, you'd explode— Aubrey