Hello MMOwned.
If you're in a pug Gruuls, and your group is made of epic fail, this exploit is very useful. Basically, this exploit allows the player to avoid a repair bill by resetting Gruul in an easily accessible, glitched location. If your tank dies or idiots die from shatter, run to this spot located here...
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When you're positioned at this location, wait for abit until Gruul aggros on to you, he will evade and eventually reset.
Gruul will put a cave in right on top of you, simply heal through it, bandage, whatever.