I thought that hot water couldn't put out fires.
A childhood belief about physics

others believed things like this
- I used to believe that the Fire Station was where all fires occurred.Anon
- I used to believe that arson was a flammable liquid, not the act of deliberately setting fires.— Joey Schwartzman
- I used to believe that firemen drove around in their fire trucks and started fires. I wondered why.— Albert
- I used to believe that house fires were caused by foolish people who put paper on the stove.— C.C.
- My mum used to tell me that you couldn't drink water out of the tap from the bathroom as it was poisonous.Anon
- My Sister Used To Believe She Could Fly By Driniking Water From A Magic Forton. I Told She Couldn't.— Zoe