Having no understanding of relative weight and lift, as a little kid I was convinced that if you could snag a bird in something like a bag and hold on to it, you'd be lifted along with it when it tried to fly upward. Fortunately, I never had occasion to test this.
A childhood belief about birds

others believed things like this
- I thought it was impossible for anyone to lift more than their own body weight. Just seemed to make sense..— Xenomorph
- Street signs with the upward pointing arrow was for airplanes. — Tammy
- I used to think that boy's lifted the toilet seat to pee because their asses were too big.— sydo
- 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 belive if someone liftes you up, and you lift them at the same time, you will float in the air.— D'Anthony
- everybody else were robots and I was a human test!
— Chas