Hahahaha! Head injuries not a problem??? This is getting farcical now. I guess you didn't see the video on Children in need last night, about a lad who (just once) forgot to put his bike helmet on, and unfortunately had a catastrophic accident involving a serious head injury. He was in hospital and rehabilitation for around 14 months and is still only just able to speak, cannot walk and needs constant attention. Now whether a helmet would have saved him completely is open to debate, but judging by the very moving words of his father, a head injury most certainly IS a problem.