Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

Well, the whole of this rhetorical helmet issue comes back to the fact you cannot say the helmet wouldve helped agar in the slightest. You just dont know.

From experience it helps deaden the blow [a lot] and saved me some blood. Also if pros trust it, its good enough for me. Plus motor cyclist friends of mine certainly have benefited from helmets so although not the same type of helmets Skin and hair certainly offer less protection that high density foam.

But no helmet protects your head from being under the wheel of a truck or snapping your spine etc etc, so careful driving and riding is the best protection.