I used to believe it was Ronald McDonald that made the sun light up because in a McDonald's commercial when I was a child he pulled a lamp cord from the bottom of the sun and it turned on. I thought the commercial was informing us that's how the sun "came on".
A childhood belief about adverts

others believed things like this
- I long believed that Ronald Reagan was Ronald McDonald's brother. And I thought it made him more impressive!— JB
- Because of a commercial I seen on tv, I thought the whole world was the size of the of the U.S.— Paulette
- i thought aliens would come to earth year 2000 because of a commercial were an alien ate a hot dog— ulle
- When I was little, I used to think the commercial advertising the Mitsubishi car was actually a Mr Fishy Car.Anon
- I used to believe that spaghetti grew on trees, based on a pasta commercial from the 70s.— Dianne
- that the green traffic light turned blue when it was off— Kriket Evens