I used to believe that, because you had to unwind electric cables and extension cords completely before plugging them in, electricity could only run in straight lines.
A childhood belief about physics

others believed things like this
- I used to think making straight A's in school was literally writing A's straight. Anon
- I use to believe if I ate something electronic Id have electric powers — jack L
- I used to believe electricity came from lightning.Anon
- I used to think that if you put geraniums into electric switches it would blow up the whole world!— Steve Jeffs
- when i was little i believed that if you got three speeding tickets that you went to the electric chairAnon
- i used to believe lava and water made electricityAnon