Living on the coast we went to the beach a lot growing up. On the way we passed through many bridges and we always were told to "hold or breath." I always heard "hold your breast." It took a while for me to catch on..
A childhood belief about cars

others believed things like this
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- when i was a little kid. i used to think that when u hold ur breath ur heart stops.. LOL :P — Annonymus
- I still hold my breath when I pass by cemetaries because it is impolite to breathe when other people can't.— Crystal
- My dad always told me to never hold my sneeze and if I did, then my head will explode.— anon.
- I remember once a friend of mine told me that when ever you hold in your pee it would make your balls stronger— Zao
- I used to believe that it was the law to hold the railing when you're walking down/up stairs— Brit