A childhood belief about people

when i was little, i was at my great grandmothers house spending the night. i had asked her the night before if i could have a slice of grapefruit in the fridge for dessert, but she said no, it was for my great grandpa's breakfast.

the next morning he collapsed while eating it, and my mother later told me he died bc the grapefruit had torn through his throat and went floating around his body until it got to his heart and clogged it up.

i didnt realize until a few years ago though that he actually had died from a heart attack that had nothing to do with the grapefruit.