Cameron was able to get an inside look at professional football from the standpoint of athletes and agents and general managers that few people have ever seen.
But the equipment to protect the players hasn't developed along with that, so now you have more players out with worse injuries, for longer periods of time.
The NFL today has bigger, stronger, bodies than ever, moving faster than ever, hitting a stationary object harder than ever before - so the physics of the hit have changed.
