When I was little I had a fluorescent bulb in my bedroom. It would often take 1-2 seconds to fully turn on. This was grand because I thought that when people were referring to the speed of light, they mean how long it took a light bulb to turn on starting when the flip was switched. This made me very happy, because I could run to the center of my room before the light came on, and was therefore faster than the speed of light!
A childhood belief about physics

others believed things like this
- In "God Bless America" I thought it was "With the light from a bulb" instead of "from above."— Carol
- I thought if you trip and fall down you fall at the speed of light!— Dietrich Corby
- I used to believe that the yellow light in traffic-lights meant Go Faster!— M. L. E.
- i believed that if you farted too much in a room and you were to light a flame your house would blow up— the nuclear fart
- I used to think that if you shone a flashlight beam onto a lightbulb long enough, it would eventually light.— Karen K
- When i was little i always thought there were little men inside the traffic lights changing the light— Kiley