It's been a long time since I've done anything on my rogue, so I thought I'd show you guys a nifty litte exploit. I'ts very easy but rogue only. You can use Killing Spree or Shadowstep on the sprites. As long as you use it on one of the sprites above one of the huge grain tanks, you will fall directly through!
(I also tried with druid's Wild Charge, even while jumping with Bubbling Beverage - Item - World of Warcraft but it doesn't work!