This is an exploit with unleash elements for shamans, basically how it works is if a mob attacks another player, or another player is about to attack an enemy you cast unleash elements.
The exploit part works with the fact that unleash elements is bugged in terms of combat and aggro.
You will tap the mob due to the fact that you did damage, but the mob will not take ANY aggro from unleash elements, so it will continue attacking its previous target.
Therefore you can use it to have others kill mobs for you.
So far this has only been tested with wf/ft weapon enchants as enhance, but the damage comes from flametongue so it will work as any spec i believe.
As you can see in the picture, the mob is tapped but attacking the mage.