When my sister and I were little, our dad told us that the Daleks from the sci-fi series Doctor Who lived in our attic (obviously to stop us going up there). Even to this day I feel slightly nauseous going into my own attic for fear they may attack me. I am 42.
A childhood belief about monsters

others believed things like this
- I used to think that a family of evil bears lived in my grandparent's attic.— jasonchic
- i used to believe that edward scissorhands lived in our family friend's attic.Anon
- Once I thought these two teenagers who used to wash my mums car lived in our attic. Hahaha!— Roxanne
- i used to believe that a mortgage was a big pirates chest that my mom and dad used to keep in the attic. — lou
- When I was a child, I used to believe that the school attic was full of ghosts and elfs.— Lia
- When I was 8, I was convinced the Daleks were going to come out from under my bed and get me!— Whaddupwho