Graham’s neck is fortified with a brace-like structure that protects his head from injury when there is a sudden movement
There is not enough strength in the neck to stop the head from jolting forward in a crash. The forward motion causes a hyperflexion injury and the backwards motion a hyperextension injury. Simply put, the neck is placed under more pressure than its structure can manage. The added danger is the spinal cord running through the neck. If it is to bend and stretch too much it will break, causing serious injuries like paraplegia or quadriplegia.