The Calvin Johnson rule, or penalty, should be that if a player is in the air to make a catch, the opposing player can not grab the back part off a player to cause a hard landing to try and force the recieving player not to catch the ball while coming down. Too many times I shivered to think that a little more pull would have Johnson landing on his head and causing a neck injury to end his career. This now seems to be a common tactic in the NFL to try and stop the jump ball in the end zone. Is this a good rule for football for player safety, or am I off on this?