Because i just did. the worst part is that it is only 4 months old... and it wasnt even in a crash, it was just sheer bad luck. i had my bike leaning against my garage, and this is something i do all the time, its extremely stable, and i put my helmet on the handlebar--the bar end inside the helmet, we've all down it-- i turn around and start walking towards my backyard where my friends were, next thing i hear... KURPLUNK. i look back and just say a silent curse word. i grabbed the helmet to check for damage, sure enough my finger found a hole in the fabric and a chunk taken out of the helmet. It didnt puncture the shell (which is good to know for safty reasons!) but it definitely lost every bit of safety it had cause im pretty sure there is a crack just lingering in the padding, and one good knock the helmet will just fall apart, killing me in the process. now i have to search for a new one, on top of other stuff... chain to go with my new sprockets, wheel bearings, tires, i gotta re-jet my bike, i need new bark busters, hell, i need a new damn bike. this sport we choose to participate is too expensive, we seriously must love it. what about you guys? any stupid stories-- or painful stories-- about how you broke your helmet?