While you're fighting the Lich King, if leave the Shambling Horror alive the fight bugs out when the LK uses his 1 shot ability. If you have DBM timers you'll see the roleplay bar count down...but nothing happens. Tirion won't even speak and you won't get ressed. Eventually you can release but when you run back in the fight is still in progress except the LK evades every attack, the only way to damage him again is to kill the Shambling Horror. When you run back in the LK & Shambling Horror will have no aggro table, you can sit on them without them aggroing back, their health pools will be the same as it was when you were killed.
This is the exploit, what I want the users of Ownedcore to try is to "drop the raid group" having only one person left in it and have them kill the LK on their own. What could this mean? Well it means you can have a group knock LK down to low HP and then have it soloed off by someone, doing this with alts would make farming the mount a lot quicker and easier. Another thing to try would be having people join in around then, so when everyone releases, no one run in, invite someone to your raid group and have them run in on their own to finish off the kill. Repeat with more alts, profit! Sadly I can't do this myself, someone in my raid group attacked the Shambling Horror when we ran back in, ruining the chance for me to do it myself.
Before anyone shouts out "No Theories!", I've provided the exploit and given a theory on its potential which isn't against the forum rules.