slvoid,

nothing personal means I'm not asking about your or my individuals experience. I'm looking for many more experiences (like all the hospital records for a 1000 admissions, say) and how many times everyone hit their head while they were doing whatever activity so we can make an objective judgement about relative risk. Something like, 10% of motorists were admitted to hospital with head injuries and 10% of cyclists were admitted admitted to hospital with head injuries.

If we don't hear something like, If i had a helmet when I slipped on the stairs, it would've saved my head, it's because we feel walking up the stairs is a relatively risk free thing to do, which is what I'm looking for to prove that cycling is full of enough risk that I'm going to fall on my head.

If you're falling on your head with frequency, I certainly understand your point of view, but that doesn't mean that everybody does the same. After all, I've often used the example of areas in the world were there are the lowest levels of head injuries foe cyclists, yet almost no one wears a helmet. I'm old enough to remember that no one here ever wore a helmet here either and there was no difference in head injuries amongst cyclists.

If there is no eveidence of elevation or head hitting to cyclists I believe this fear of hitting the head on a bike is a manafactured fear not based in reality.