well i was messin around and found this out (by the way i [relz] wrote this =P)
ok well first go into the AH and walk up to the counter where all the auctioneers are standing. Next walk over to the left like in the picture below.
http://img.villagephotos.com/p/2005-2/963121/first.JPG
walk over into the corner, press jump then forward and repeat. you should be going up like in this next picture.
http://img.villagephotos.com/p/2005-2/963121/second.JPG
once your all the way up(like this http://img.villagephotos.com/p/2005-2/963121/third.JPG)
then use auto unstuck. (hearthstone must be on cooldown).
you should warp for ward and be behind the counter but still up on that edge. (http://img.villagephotos.com/p/2005-2/963121/fourth.JPG)
now just drop down and boom!
http://img.villagephotos.com/p/2005-2/963121/woot!.JPG
now have fun and laugh at everyone else =D