I know this works with a rogue i'm not sure if it works with any other class.
If you don't know what I'm talking about, there is an area in the alliance brawler's guild that you can only get to if you have killed all bosses on rank 8, attempting to get to this place without the correct bosses killed will just teleport you out.
This exploit requires a warrior, the warrior will place a banner as far up the ramp as they can that is still in LoS to the rogue, the rogue shadowsteps the banner and will not be teleported back down.
There isn't really any benefit to being up here other than a a better view of the area, since almost no one has killed all the bosses yet no one is up here at all.
EDIT: Please move this to exploration, i'm an idiot.