My sister was haunted by the belief that a fox would take her and eat her. She always looked under her bed before she jumped all the way from the door and right into the bed (several meters! LOL!) Then, safe in bed, she bent over to check again under the bed.
Her cousin told her that foxes even could climb walls, so she had to stop sleeping with her window open.
A childhood belief about under my bed

others believed things like this
- When I was little i thought grandparents had to be hundreds of meters tall... Anon
- I used to believe that foxes crawl like crocodiles!— Viktor
- I used to belief sloths lived in trees outside my childhood home. My older sister told me so.Anon
- i used 2 believe when i left my closet door open at
night a skelleton would pop out and wave at me— bex - I thought if I left the door open too long, a dog would come from the cupboard in the washroom and eat me
Anon - I used to think that 'Child Locking' only worked on children and that older people could still open the door.— Anonymous Whistleblower