wow. I am a personal survivor of severe head trauma due a bicycling accident. I spent several days in hospital and have had re-constructive surgery. All that could have been avoided if I had worn my helmet instead of being a dumb teenager. I still ride my bike, but always ALWAYS with a helmet. It's like a seat belt. Statistically you might not ever NEED a seat belt to save your life because you'll never be in an accident, but why take the risk? So dumb.