When I was in grade school, the latest craze in candy was Pop Rocks, a candy that fizzed and popped when you put it in your mouth. I was always told that if you ate Pop Rocks and drank soda that your stomach would explode. This comment was always preceded by "I head about this kid who...." One time I ate Pop Rocks and a minute later had a drink of Pepsi, only realizing after what I had done. For weeks I thought the food was just falling down inside me instead of going in my stomach. I kept waiting for the pain to start. :)
A childhood belief about dangerous food

others believed things like this
- I used to belive that if you drank soda pop and ate pop rocks at the same time, your head would blow up. — erin
- I used to believe that you would explode if you drank cola and ate pop rocks at the same time.Anon
- I believd that if you ate popping candy and drank softdrink just afterwards your stomach would explode— Kat
- I used to believe that mirrors were found inside rocks.— Optional
- I used to believe that rocks are animals.— Lulzy
- I thought that islands and continents were floating rocks so you could swim underneath them.— Kat