Blizzard released a patch February 2, 2012 that caused a paladin ability to be able to proc off of itself, for extremely long chains of procs from a single hit under certain circumstances. It would happen in an instant but cause the server and everyone in the raid to freeze until the server caught up with the damage that was just done. The paladin would pull threat from doing so much damage and would need resurrected or some other protection. They patched it later that night, but was fun while it lasted. We beat this same boss the next raid day that same week without this bug.