What are some weird things you believed as a child that you essentially came up with on your own? Active imagination? Just weird kid logic?

When I was like pre-school aged and probably a bit younger I slept in the tightest fetal position because I had somehow convinced myself there was a lion that lived at the end of my bed. I thought he would come out at night and eat my feet. I don’t think I ever told my mom about this belief and just coped with it by vowing to never extend my legs at night.