When I was five or six I saw an episode of the Twighlight Zone tv show in which a little girl somehow fell, without any warning, right through her ordinary-seeming bedroom wall and into the foggy and horribly scary fourth dimension! From that point forward I was very careful not to touch or lean against bedroom walls and of course would never, ever fall asleep too close to one.
A childhood belief about around the house

others believed things like this
- when i was young i used to believe that when it was foggy, it was because the clouds were asleep— AdelaidA
- I used to believe my bedroom closet was actually a time machine.— Carrie
- I knew lightning could come in through my bedroom window and kill me.
— Cyn - i used to believe dragon ball z was real
and namek was in another dimension
and every show on tv was realAnon - I used to believe that one of Lady Gaga´s songs goes "bedroom ants" instead of "bad romance"— Anon the III.
- i used to think when i fell asleep spiders would capture me and eat me.— SPIDERMAN