As I would lie in bed waiting to get to sleep, I could hear my pulse / heartbeat. Quite normal. But I didn't understand that it was my pulse and concocted the fiction that the sound was actually footsteps. Specifically, the footsteps of a man (moustached, wearing a safari outfit) who was walking his way from Africa to my house and who would kill me when he got there. Fortunately, I figured that Africa was so far away it'd take him a couple of years to get to me. I felt safe knowing that I had at least a couple of years to live (*rolls eyes*).
A childhood belief about sleeping

others believed things like this
- At nights, when I have trouble sleeping, I used to hear large footsteps - something like the Godzilla.— John
- I used to think the olden days came once every couple of yearsAnon
- that the word "couple" as in "a couple of items" was synonymous with "several", rather than "just two".— Blair A. Petterson
- I used to believe that traveling in cognito was a place in Africa or somewhere.— Jennifer
- I used to believe that other coutries were other planets and you had to travel in a spaceship to go to Africa.— Sarah Jane
- I used to belive that african was the language they spoke in all of africa— quark