Who said I did all my riding in the Netherlands? Also, I don't think there's much difference between a 100 meter hill and a 1000 meter mountain; unless you're one of those people who specializes in bicycle speed records, you're going to ride at or at least near maximum speed fairly quickly. Finally, bicycle safety also means taking into account one's own limitations. As in, if you aren't physically capable to ride at certain speeds, which usually manifests itself in repeated crashing, you should limit your speed. Pretending that crashing is an inevitable result of riding a bicycle on a mountain, makes you look a bit clueless in al things cycling safety.