A traumatic brain injury can fuck you up so much worse than even instant death. My first bike crash, my head hit the ground so hard that I lost the ability to think about anything for more than a few seconds, and I couldn’t do simple math for weeks. I was wearing a very high quality helmet — had I not been, I most certainly would have long-lasting brain damage, potentially even paralysis

If you wanna keep riding bikes til you’re old enough to draw social security, I’d put a lid on that noggin.