The role of the 2nd player in the tackle should not be dismissed.
Looking at that video, this is clearly a combined wrestling effort that could have gone horribly wrong.
It's not until the 2nd tackler lifts Haynes leg that Chambers then decides to slam down on the top half of Hayne's body, including his head.
This is a shocking, disgraceful tackle and could easily have ended in catastrophe.
It needs to be stamped out of the game. Pronto.
I will always despise Craig Bellamy for the exploitation of the rules and gutter tactics that he has introduced to RL.