&gt; I&#x27;m not saying helmets don&#x27;t work, I&#x27;m saying it&#x27;s not very likely to hit your head at high velocity on the ground if you were going 10 km&#x2F;h.<p>Because if you fall over while walking, you&#x27;re likely to manage to get your hands down before you head hits the ground. You have nothing to lose by getting your hands down quick.<p>By contrast, when you run into problems while cycling, your instinct is to try and regain control of the bike. You don&#x27;t immediately drop the handlebars, You keep your hands on the bars and try to steer&#x2F;brake. Moreover you&#x27;re likely to go over sideways and only one hand tends to be able to break the fall.<p>A fall from a bike and a fall from your feet is a massively different thing.