Just had an update, operating today on arm, has concussion and fractured skull plus other cuts, grazes and bumps and similar effect to whipash. Crash was at least 25 mph and he bounced about 30feet on the tarmac. Helmet was held together by outer shell but cracked inside on right hand side where fracture is. It functioned as designed. Absolutely no doubt in my mind that had he not been wearing it we would now be arranging a funeral. By all means have the choice to wear one or not, i know what my choice is and it’s a no brainer. Paramedics did a great job, well impressed by how cool, professional and caring they were. I can’t begin to tell how scary it is and how helpless you feel to see your mate unconscious on the floor and not know much first aid, think i will be looking into doing a course after this.