When I was young I understood that people died in one of two ways: either through old age or some terrible accident or disease. However, I thought that once someone had a mid-life crisis, they knew *exactly* what age they would die by simply doubling however old they were when it happened. It made sense at the time, and indeed until I was probably 11 or 12 years old.
A childhood belief about people

others believed things like this
- I used to believe that all old people got the disease "OLD TIMERS DISEASE" Instead of alzheimers disease :D— MollyJohnson
- I thought there was some video games so hard that if you died on them you also died in real life!— Kakuri
- When I was 10, I thought that nausea was called Lack-O-Candy Disease. My mom made it up— Teddybearhaha
- I used to think that Alzheimers disease was called Old Timers Disease.— Justin
- When I was little I believed when an actor died in a movie, he died in real life.— Ben
- That Alzheimer's Disease was Old Timer's Disease.— Todd K