Yeah... i agree. But i think that helmets are only supposed to help you up to like 15 mph or something stupid. The requirements for those things are rediculous.
well unless you land completely on your head without touching the ground or anything first youd be going more then 15, but if you put your arm out or something to cushion the blow youd be straight. nothings gonna protect you if you smack your head going 40 mph