When I was 4 or 5, we had a cat. This cat would eat anything on the planet, so long as it crossed her path. My parents used to call her the Walking, Talking Vaccuum cleaner, and I was CONVINCED that the vaccuum cleaner was going to get me in my sleep. (I made no connection whatsoever to the cat) I would lie in bed, waiting for this vaccuum cleaner to come and eat me. I'd scoot as close as I possibly could to the wall and fall asleep there, hoping the vaccuum wouldn't come and suck me up!
A childhood belief about under my bed

others believed things like this
- When i was little i used to believe that i could suck up a tornado in a vaccuum if it came in my house.Anon
- I used to think that "elbow grease" was an actual product of kitchen or surface cleaner.— Carrie
- I used to believe that the "Pledge" of Allegiance had something to do with our "Pledge" cleaner. — Pledge
- when i was a kid, i used to think that if i didn't fall asleep, morning wouldn't comeAnon
- If you suck your thumb it would eventually go black, shrivel up and fall off.— Charlotte
- i used to think that when i went to sleep gonzo from the muppets would suck me up through his nose and eat meAnon