A helmet saved my life. One Friday after work, I took my mountain bike out to the BMX track at Bigfoot Park for some jumping (in reality I'm a middle aged lawyer but in my mind I'm a teenage X-gamer). On the last jump of my last trip around the track before going home, I hit the jump as fast as I could, got as high as I could, and had a terrible crash, landing on my head and shoulder. My helmet had six large cracks. At the ER, after x-raying my broken collarbone, the doc inspected my helmet and said it saved my life. He told me the helmet is stronger than the human skull. He said my brains would be splattered at Bigfoot if I hadn't been wearing a helmet. Maybe he was B.S.-ing me but I'm a believer: ALWAYS WEAR A HELMET.
Here's a re-enactment of my wreck: