1. This is a cycle forum, so therefore despite the fact that this type of head injury is far more common it is naughty to mention themHave a watch of the most recent episode of '24 Hours in A&E'. A 74-year-old woman falls five feet onto concrete, landing full on her face. The cuts are horrible, there's lots of blood, she has a black eye. No bones broken. No brain damage. And of course, no helmet, as you don't need one for gardening apparently. The human skull is tougher than you think.