I used search, and couldn't find this post anywhere else, so here it is.
This technique most likely works best with a rogue, due to stealth and vanish, though is possible with anyone else.
1) Enter the battlegrounds queue room located in eastern IF.
2) Walk around to the wall straight ahead crossing the "bridge"
3) Take a right, and jump onto the "platform" against the wall.
4) Jump onto the airstrip where you see the aircrafts fly off
5) With a ranged attack, shoot one of the elite battlemasters.
A couple of the elites will use a cleave move, which does around 1500 damage per swing to all unflagged alliance around him. The longer you stand there, the more they will cleave It usually takes alliance a minute or so to figure out you are there.
*If you are not a rogue, you will need to run with your mount into their room, die by the air strip, and then rez on the air strip.