Just look at the difference between racing boots and avenue boots -- excessive-speed racing boots nearly universally include plastic or composite shells for sliding throughout the pavement, and a more supple liner to maintain your toes comfy. Similarly, turning a shoulder into an onrushing car, tree or street sign can break the clavicle from direct impression. A neck collar can enable you keep away from the second -- a clavicle break due to direct influence. Start with the cervical spine (neck)...