A true life expiriment. Closet and other anti helmet crowd claims that if a helmet breaks it did nothing. Try this. Take an empty styofoam coffee cup. (make that an empty cup--sure dont want EPA nazis getting upset) Push down on it. It will give (that means taking up energy) and then will finally break. Since it took up energy before it broke it is doing its job. A broken helmet does the same thing.

Btw as I have posted before I personally feel cooler with a helmet--mine is white and well vented with a visor. Also it does provide some shade for my ears from the sun. A helmet could even provide some protecton fron skin cancer.