I found this the other day when pullin goblins that were in a room and had multiple encounters near them. If you hail a mob,before you body pull it, it will face you making its aggro range longer than all of the others if they aren't looking at you. This allows you to pull only the one encounter with the longest sight range. This is confirmed with other players from my guild that I also mentioned it to.
BAH!
rocks :judge
BAH!
rocks :judge