When I was little (I can't remember what age) I was told by my parents to "never ever put grapes in the microwave because they'll explode." When I asked if it would be a 'little explosion' (meaning the grape would pop or something) or a 'real explosion' (meaning an enourmous fireball) I was told "a REAL explosion".
Although I know better now, I'm still wary of putting grapes in the microwave :)
A childhood belief about dangerous food

others believed things like this
- When I was a kid I was convinced that the world would end by a nucleur explosion. — Marshall M
- I actually asked my mother if mixing girls' poop and boys' poop would cause an explosion.— kraine
- I used to think that grapefruits contained grapes, and you got grapes by cutting the grapefruit open.— Grapefruit
- I use to believe that if you ate too much grapes, you'd get drunk.— Grace
- I used to believe that you could get cancer from looking in the microwave while it was running.— Kayla
- When I was little I thought the microwave was the Michaelwave because my name is Michael.— Michael