As a kid I had heard that if you feed birds uncooked rice or alka seltzer they would explode. I thought it meant they would explode like a bomb with fire and shrapnel.
A childhood belief about birds

others believed things like this
- When I was young I used to believe if you gave a seagull an alka seltzer it would explode— Tonya
- My family told me that if I ate uncooked oatmeal that it would swell up and my stomach would explode.— david
- I use to think that alka seltzer tablets were instant 7UP soda until one day I tested my belief. — aj
- I used to believe that if you ate rice and water and jumped up and down you would explode. Thanks Dad.— Nina
- I thought my brain would explode if it was in the sun too long— Heather
- i thought "two pence a bag" from feed the birds from mary poppins was "toppins of ag"Anon