I used to believe that it was the law to hold the railing when you're walking down/up stairs
A childhood belief about going shopping

others believed things like this
- I used to believe I could fly.
All I had todo was step of a flight of stairs and I'd be walking in the air...— Dolly - i used to think the song "walking in a winter wonderland" was "walking in a womens underwear"— stephen s
- I used to believe that jay walking was walking naked on the street. — Kendra
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- I used to believe I could fly when I was about four, until I fell down the stairs.— Sarah
- I used to think you could die if you jumped half way down the stairs. Anon