In the outlands its a nifty trick to use. Ill post examples at the end of this explanation how you can use it for something usefull.
What this is is bugging mobs onto a plattform or ledge where they cant get down or better said you normaly are not suppose to get to, i.e. like mushrooms in zangamarsh or thos ledges in slavepens.
So what you must do, go onto your normaly unreachable ledge or mushroom and choose a mob below you, use a throwing weapon or clap your hands and jump around, just do anything to get aggro from that mob or mob group.
Now wiggle back and forth with your character useing "Q" and "E" realy fast, it will take some practice but if you do it correctly then thos mobs will teleport up to where you are standing, now jump off that ledge before they kill you^^ now you have open area where thos mobs where standing.
Now things you can do with this:
In the slavepens there is a chest right in the big first room with a platform typ thing next to it, jump up to that in stealth and aggro thos mucs standing around the chest and wiggle your *** off then jump down and loot
Doing quests or finding chests or herbs can be a big pain in the **** with alot of mobs jerking off around your objective or item. Use that trick i.e. the outlands where you can fly anywhere and then get what you wanted.
Bwa auf deutsch den mist zu schreiben is mir zu anstrengend, hier eine kurz fassung:
Geht auf eine plattform wo normalerweise keiner hinkommt (du aber türlich mit walljumping oder flugmount) kriege die mobs irgentwie dazu dich ****** zu wollen und waggle dann mit "Q" und "E" hin und her bis die sich zu dir porten und spring dann runter und erledige was du wolltest.