None of them wear helmets.
Have you ridden up the Rake? You’re unlikely to get up enough speed to do yourself much damage. Walking is generally quicker.
Having said, that you could bang your head when blacking out and keeling over at the top, or an over enthusiastic head movement while violently throwing up over the wall.
We need to give nuff respect to DazH of this parish, who not only did it on Sunday in a very impressive 3 mins 50, but also got me to get him a pint in for when he crossed the line