A childhood belief about afterlife

My parents are atheists, and raised me as such, but nearly everyone else I knew was Christian. So I'd heard the Christian answer to "what happens when we die" because I had religious friends who had deceased relatives, but I'd never heard the secular answer. All I had heard from my parents on the subject was my dad's jest; "heaven must be awfully crowded."

For the longest time I was convinced that there wasn't enough room in heaven for atheists, so - naturally - we were allowed to keep on living forever until some space freed up. Yup. Still kind of disappointed about this one, actually.