After watching the movies Volcano and Dante's Peak when I was WAY too young, I was afraid to take a shower or bath for a week because I used to believe lava would come out of the taps.
A childhood belief about bathrooms

others believed things like this
- i used to believe that dogs were born in the sky and would fall from a paracheute.
-Dante-— Dante - I used to believe the toot fairy stole your money.
-Dante-— Dante - i used to believe that a volcano was an upside-down UFO in disguise— Sally
- I used to think that if you left the taps on for too long the sea would run out.— fletch
- I used to believe that inside each volcano there was a guy who'd press a button to make it erupt.— Jim, UK
- I used to think Tomato soup was Lava.— Daniel Green