I used to believe that if I swallowed gum I would bubbles when I 'trumped'.
A childhood belief about chewing gum

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 a kid My friend’s mom told me if I swallowed my bubblegum it would make me fart bubblegum bubblesAnon
- I used to think when you farted, bubbles came out.— Nick
- I used to believe that eyes where just like bubbles and if you where to touch them they would pop.— Adam
- If i farted in the tub the bubbles would be different shapes.Anon
- Because i could not see them, i thought my farts came out as green bubblesAnon