Helmet to Helmet hit

Two weeks ago, a rules was changed by the football players association. The helmet to helmet hit. They decided that if you hit a guy with your helmet, you will be suspended or penalited. But a player, named James Harison didn't understand those rule. He got three pv for a big total of 105000 $. Abd he were suspended for three games by  Roger Goodell the NFL commecier. This rules was decided to protect the football players and to reduct the cerebaral concussion and it is working because since this rule was placed, no one player was victim of a cerebrale concussion.