Whenever I heard "cross at the green, not in between," I thought it meant that you were supposed to cross the street when the light is green and all the cars are going, and not when the light is in between (yellow or red). Clearly this was wrong. I made up my own rhyme, "Cross at the red, or get run over instead." It took me years to realize that the rhyme just tells kids to cross at the traffic light.
A childhood belief about cars

others believed things like this
- when I saw a sign with a deer on it I always thought deer had to cross the street by it. like a cross walk— only me
- that the green traffic light turned blue when it was off— Kriket Evens
- My dad could change a traffic light from red to green using our garage door opener.Anon
- I used to believe that the yellow light in traffic-lights meant Go Faster!— M. L. E.
- I used to think that running cross-country meant you ran across the entire nation!Anon
- When I was little I though "A Cross" was a mud/tar pit and that Jesus drowned.— Usagi Ohkami