I used to think that commercials that say "get your free gifts now" or "available now" or anything that says "now" meant that we have to rush there within a few seconds before the commercial ends.
A childhood belief about adverts

others believed things like this
- I used to believe that priceless meant free.— Neo
- I used to think that "priceless" meant free.— DAAA
- I thought if food said it was fat free it meant you could eat as much as you want without getting fat!— Brainhead
- I used to believe that "gluten free" meant you could eat as much as you wanted without getting full or fat— Jess
- When I first heard Matt Monro's song "Born Free," I thought he was singing "Porn Free."Anon
- When i was a tiny lad, I used to think drug free zones were places where you can get drugs for free— Spencer