I have done a lot of neurological examinations in no loss of consciousness head injury. Two groups in which I was interested were cyclists and motorcyclists both of which wore helmets. I was surprised to find using the US Military MASH score how many had disordered cognitive function and yet there had been no presentation to either their GP (office physician) or to a specialist. I was equally surprised to see that boxing coaches had abandoned head protection as it increased the risk of concussion. This film shows the effect of repeated trauma especially in one group when wearing head protection NFL but also in others. As the US is taking a closer interest in prevention mechanisms, in the UK both soccer and rugby, neither of which use head protection, have the most rudimentary and casual on pitch assessment and the message is to play on whatever. This is a must see for the governing bodies, especially as one of their advisory physicians is quoted as resigning his post due to a shortening of time out against the grain of increasing time away from impact. To see a retired pro NFL player unable to remember what comes after April in month sequence is very sad, and distressing for all involved, yet he has a playing history included in the greats! On the technical side there is plenty for interested pathologists to look at and the material source is increasing as mental health problems are now frequently seen leading to suicide and the inevitable post mortem harvest of brain tissue.