As a child, I felt certain I'd witness at least one untimely death in quick sand. Possibly my own.
I also felt certain I'd be burgled in the middle of the night on multiple occasions by a duo of tiptoeing men, one of whom would be wearing a stripy top.
And I felt sure that, at least once in my life, I'd wake in the night to a room filled with smoke as my house burned down around me. I still won't let my dog sleep downstairs just in case of fire.
These eventualities were so ubiquitous in children's media - I was born mid-80s - that I was sure they were just eventualities. In fact, almost obligations - these things were so ubiquitous to be almost legal mandates - that everyone had to experience a house fire, burglary and a brush with quick sand death at some point.
What things from your childhood turned out to actually be far less of a risk than you'd thought?