[charleso]

Do you bike faster than you can run?

Would you run, as fast as you can, head-first into a concrete wall?

No, it does not make sense to bike without a helmet.

[jrockway]

"Bad things only happen to other people. I would never crash my bike," is the idea, I think.

Statistically correct, I guess, but I'm a pessimist so wear a helmet anyway.