I used to believe the side railings in public (handicapped) restroom stalls were there just in case of an earthquake. Wanting to be careful, if I wasn't allowed to use that particular stall, I would 'go' really, really fast - in fear that a quake would hit while I was indesposed. (Point to note: I grew up in East Tennessee - and have never felt an earthquake.)
A childhood belief about disasters

others believed things like this
- I used to believe that when there was an earthquake, rocks would fall from the sky.— Nai
- I used to believe that if you didn't eat your crust on the bread, there would be an earthquake.Anon
- when i was 4 i thought an earthquake was an earth cake!— chardog
- I wasn't allowed to cut my nails on a sunday , don't ask me why.— martin
- Hasn't everyone, at some point or another, believed that pickles grew on trees? I sure did.— Matt c.
- when I was little, I thought the big stalls were for royalty and celebrities, when they visitedAnon