I had endless lists of "I must do that or XYZ will happen" which I guess potentially was Obsessive Compulive Disorder!" I was never quite sure of what the thing was that would happen only that it was 'bad'. These lists included the belief that I must hold my breath for as long as it took for the kettle to boil, having to get downstairs before the toilet flush stopped, seeing how long I could close my eyes whilst going top speed on a bike, having to reach a specific point in a certain number of steps...Oh dear,I DID grow out of it though!
A childhood belief about around the house

others believed things like this
- i thought that if you held in your fart you burp if you happen to hold both in you explode!— ahh!
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- I used to believe that the rock thing they used in the sport Curling, was a tea kettle.— Kaninchen
- I thought everyone only had a set number of breaths before they died.
I breathed slowly for a long time.Anon - I thought that I could get a suntan if I stood really close to a fire for long enough.— Mat
- when i was a little kid. i used to think that when u hold ur breath ur heart stops.. LOL :P — Annonymus