Helmets are good for other things too.
This is why you should never try to cross a flood.
Look out below! Next time don't walk up a dirt bike path.
Not only does he botch the stunt but the dirt bike smashes him in the head.
Might be the quickest bmx bike race ever.
One little tree and this dirt biker can't avoid it.
He would have never know what hit him. He was a lucky man that day.
Unless you want to get knocked out.
Yet another idiot trying a fearsome stunt.
If a mountain biker crashes in the woods does it make a sound?