Yeah a helmet is sort of a hail-Mary. We say &quot;I&#x27;m hurtling down the road at 20mph on a contraption make of pipes and sharp things, wearing shorts and a t-shirt. But I&#x27;ve strapped a block of Styrofoam to my head, so I&#x27;m <i>Safe</i>!&quot;<p>Its clearly not enough. But what is? Its kind of like, you cycle, you sign up for the risk.