I wonder if Theo Zeegers has ever smashed his head into something really hard at speed ?
if he had he may have a more obvious opinion of the efficacy of a helmet.
I love statistics, my favourite is the number of bullets it takes to kill a man in war , ww2 took 25000 rounds to kill 1 man. unfortunately an average platoon of 30men couldn't carry that number of bullets, so they couldn't have killed anybody. - so logically nobody died from small arms fire in ww2.