When I was in second grade (8 years old), I was standing in line with the other kids to have the teacher check my work, and two boys and I started a contest to see who could hold their breath the longest. I filled my lungs with air, and held my breath for the rest of the time I was in line. The thing that amazed me was that I didn't even feel the need for air while holding my breath, I was just as comfortable as I had been while breathing. Needless to say, I thought I was really good at holding my breath, and wondered why no one else noticed how long I was doing that.
It wasn't until a couple of years later that I realized I had been breathing through my nose.
A childhood belief about special powers

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
- I used to dream that if I held my breath, I could swim through the air for brief amounts of time— Adam
- I held my breath near cemeteries because I thought it would be rude to inhale spirits. Anon
- when i was a little kid. i used to think that when u hold ur breath ur heart stops.. LOL :P — Annonymus
- I used to think that if you held a turd in for more than an hour it would give you bad breath— phil
- I still hold my breath when I pass by cemetaries because it is impolite to breathe when other people can't.— Crystal