I watched this movie yet,

That's terrible how american football players hit their heads like goats. I don't know how is it in christ believe but in islam believe hit to head (to a human or animal) is forbidden. I don't understand Dr. Omalu find out american football far away more dangerious than even boxing, why hit to head doesn't forbidden in american footbal? Can't play this game without hit to head? Maybe they get new rule to players hit by shoulders and move their heads right at hit time? That movie says %28 of american football players effected brain ill because of hit the head. That's terrible.