I've not seen anyone cycling at normal speeds fall off like that before. It's always a result of swerving because of someone else, or because they're going too

I've not seen anyone cycling at normal speeds fall off like that before. It's always a result of swerving because of someone else, or because they're going too fast and the aerodynamics take over their steering. The most I've done is lost a saddle because the force of me sitting down while cycling over a pot hole I didn't see snapped it off. I have however seen many cyclists go over car bonnits, including myself