I used to believe that if you went swimming in the pool of a cruise ship, you'd come back to the surface and end up in the middle of the ocean.
A childhood belief about swimming pools

others believed things like this
- I believed that the ladder on the back of a trailer/rv led up to a swimming pool.— marilese
- i used to believe that the white foam on the surface of the ocean were unicorns trying to escape.— intunedwithmagic
- I used to believe that the waves in the ocean were made from whales swimming by...— Tina
- I used to think that a "pool shark" was an actual shark that lived in a swimming poolAnon
- I used to believe that if you farted while swimming in the pool, it could propel you foward really fast.— Rick
- Up until I was in 3rd grade I believed my bathing cap is what kept me afloat in the swimming pool! Anon