When I first learned how a helicopter's rotor gives the helicopter lift that raises it off the ground and keeps it suspended in the air, I decided that in buildings that had ceiling fans, the fans were part of what was holding the ceiling up, on a similar principle.
A childhood belief about physics

others believed things like this
- My brother used to believe that ceiling fans were helicopters flipped upsidedown and stuck in the ceiling.— Seven
- when i was little i used to believe that when you died a helicopter came to take you to heaven— purplefish
- I used to believe that everytime i saw a helicopter the A-team were in it on their way to fight the baddies!— Natalie
- I used to believe that Elvis died when he was trampled by fans.— Aretia
- When I was child I used to believe the future going to be similar like in the film Back to the future part 2 — Frankie
- I thought ground beef was the meat they scraped off the ground at the slaughterhouse. Yuck.Anon