When I was younger I thought that whenever the ball went over the goal line in football it was a corner, regardless of who kicked it out. This meant that instead of a goal kick, you had to cross the ball into your own box! I never let the ball run out for a goal kick because of this. Not great cos I was playing for the school team at the time!
A childhood belief about sport

others believed things like this
- I used to believe that a hat trick in football was achieved when a player scored a goal with their head!— Andy
- I used to think volleyball was actually called "ball-y ball"Anon
- I was told as a kid that when it thundered, God was playing basket ball. LOL! — Tony
- I used to believe that your brain was a red rubber ball inside your head.— Greg
- I used to belive that the New Years ball exploded, and people who were near it died.— Angela
- I used to believe that eye-lash curlers were eye-ball eating aliens in disguise— Eliza